TOÁN 5 [36 đề tập 1]

["\u0110\u1ec0 13 B C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: T\u00ecm x bi\u1ebft: a) 7,3 \uf0b4 x + x \uf0b4 2,7 \u2013 x = 405 x = 40 \uf0a8 x = 40,5 \uf0a8 x = 45 \uf0a8 C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S: A. Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh khi \u0111\u1ed5i t\u00ean \u0111\u01a1n v\u1ecb 3180mm =\u2026\u2026\u2026\u2026\u2026\u2026\u2026..m a) 0,001m \uf0b4 3180 = 3,180m \uf0a8 b) 3180m \uf0b4 0,001 = 3,180m \uf0a8 B. Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh khi \u0111\u1ed5i t\u00ean \u0111\u01a1n v\u1ecb 1500m2 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026..m \uf0a8a) 1500m2 \uf0b4 0,0001 = 0,15ha \uf0a8b) 0,0001ha \uf0b4 1500 = 0,15ha C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: a) 25 + 2,18 x 5 b) 25 + 2,18 x 5 c) 25 + 2,18 x 5 = 2,18 + 25 x 5 = 27,18 x 5 = 25 + 10,90 = 2,18 + 125 = 135,90 = 35,9 = 127,18 \uf0a8 \uf0a8 \uf0a8 C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: C\u00f3 24 chai \u0111\u1ef1ng d\u1ea7u h\u1ecfa, m\u1ed7i chai ch\u1ee9a 0,75l d\u1ea7u. M\u1ed7i l\u00edt d\u1ea7u h\u1ecfa n\u1eb7ng 0,76kg. M\u1ed7i v\u1ecf chai n\u1eb7ng 0,25kg. H\u1ecfi 24 chai d\u1ea7u h\u1ecfa c\u00e2n n\u1eb7ng bao nhi\u00eau ki-l\u00f4-gam? A. 18kg B. 19,68kg C. 20,4kg C\u00e2u 5: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t: a) 2 x 4 x 8 x 0,5 x 0,125 x 0,25 x (0,4321 + 0,5679) = ............................................................................................................................................. = ............................................................................................................................................. = ............................................................................................................................................. 51","= ............................................................................................................................................. b) 3,7 x 3,8 + 8,3 x 3,7 \u2013 0,4 x 3,7 x 5 = ............................................................................................................................................. = ............................................................................................................................................. = ............................................................................................................................................. = ............................................................................................................................................. C\u00e2u 6: T\u00ecm x v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n a, bc bi\u1ebft: a, bc\uf0b4 xx \uf03d 77,33 ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 7: M\u1ed9t \u00f4 t\u00f4 \u0111i t\u1eeb A \u0111\u1ebfn B h\u1ebft 3 gi\u1edd. Gi\u1edd th\u1ee9 nh\u1ea5t \u0111i nhi\u1ec1u h\u01a1n m\u1ee9c trung b\u00ecnh c\u1ee7a c\u1ea3 3 gi\u1edd l\u00e0 5,45km. Gi\u1edd th\u1ee9 hai \u0111i \u00edt h\u01a1n m\u1ee9c trung b\u00ecnh c\u1ee7a c\u1ea3 3 gi\u1edd l\u00e0 4,15km. Gi\u1edd th\u1ee9 ba \u0111i \u0111\u01b0\u1ee3c 48,75km. H\u1ecfi qu\u00e3ng \u0111\u01b0\u1eddng AB d\u00e0i bao nhi\u00eau ki-l\u00f4-m\u00e9t? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 52","\u0110\u1ec0 14A C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: 112,5 9 112,5 9 5,24 6 5,24 6 22 125 22 12,5 44 87 44 0,87 45 \uf0a8 45 \uf0a8 00 00 02 02 \uf0a8 \uf0a8 C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: A. 31,2 : 37 = 0,84 (d\u01b0 12) B. 31,2 : 37 = 0,84 (d\u01b0 1,2) C. 31,2 : 37 = 0,84 (d\u01b0 0,12) D. 31,2 : 37 = 0,84 (d\u01b0 0,012) C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: a) b) 136 16 136 16 92 29 92 29 80 85 80 8,5 50 3,17 50 317 00 00 210 210 \uf0a8 \uf0a8 07 \uf0a8 07 \uf0a8 C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: T\u00ecm x bi\u1ebft : x \uf0b414 \uf02b 7 \uf03d 1141,07 100 a) x = 81 \uf06f b) x = 81,5 \uf06f c) x = 815 \uf06f C\u00e2u 5: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: 25 \u00f4 t\u00f4 nh\u01b0 nhau ch\u1edf \u0111\u01b0\u1ee3c 107 t\u1ea5n h\u00e0ng. H\u1ecfi 15 \u00f4 t\u00f4 nh\u01b0 th\u1ebf ch\u1edf \u0111\u01b0\u1ee3c bao nhi\u00eau t\u1ea5n h\u00e0ng? A. 6,42 t\u1ea5n B. 64,2 t\u1ea5n C. 62,4 t\u1ea5n C\u00e2u 6: T\u00ecm x: a) x \uf0b4 9,1 + x \uf0b4 9,1 = 26,4 b) x \uf0b4 9,9 + x : 10 = 12,5 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. 53","C\u00e2u 7: T\u1ed5ng hai s\u1ed1 102,1. T\u00ecm hai s\u1ed1 \u0111\u00f3 bi\u1ebft n\u1ebfu s\u1ed1 th\u1ee9 nh\u1ea5t g\u1ea5p 5 l\u1ea7n s\u1ed1 h\u1ea1ng th\u1ee9 hai gi\u1eef nguy\u00ean th\u00ec \u0111\u01b0\u1ee3c t\u1ed5ng m\u1edbi b\u1eb1ng 329,3. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 8: M\u1ed9t c\u1eeda h\u00e0ng c\u00f3 2007,8 t\u1ea5n g\u1ea1o. Ng\u00e0y th\u1ee9 nh\u1ea5t b\u00e1n \u0111\u01b0\u1ee3c 1 s\u1ed1 g\u1ea1o. Ng\u00e0y th\u1ee9 hai 5 b\u00e1n \u0111\u01b0\u1ee3c 3 s\u1ed1 g\u1ea1o c\u00f2n l\u1ea1i. 8 H\u1ecfi sau hai ng\u00e0y b\u00e1n c\u1eeda h\u00e0ng c\u00f2n l\u1ea1i bao nhi\u00eau t\u1ea5n g\u1ea1o? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 54","\u0110\u1ec0 14B C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: \uf06fA. 86,04 : 42 = 2,4 (d\u01b0 36) \uf06fB. 86,04 : 42 = 2,04 (d\u01b0 36) \uf06fC. 86,04 : 42 = 2,4 (d\u01b0 0,36) \uf06fD. 86,04 : 42 = 2,04 (d\u01b0 0,36) C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Khi n\u00e0o th\u01b0\u01a1ng hai s\u1ed1 b\u00e9 h\u01a1n 1 A. S\u1ed1 b\u1ecb chia l\u1edbn h\u01a1n s\u1ed1 chia. B. S\u1ed1 b\u1ecb chia b\u1eb1ng s\u1ed1 chia. C. S\u1ed1 b\u1ecb chia b\u00e9 h\u01a1n s\u1ed1 chia. C\u00e2u 3: N\u1ed1i ph\u00e9p t\u00ednh v\u1edbi k\u1ebft qu\u1ea3 c\u1ee7a ph\u00e9p t\u00ednh \u0111\u00f3: 25,18 x 0,1 2,518 25,18 : 0,1 25,18 x 0,01 0,02518 25,18 : 0,01 25,18 x 0,001 25,18 : 0,001 251,8 : 0,1 251,8 x 0,1 0,2518 251,8 : 0,01 251,8 : 0,001 251,8 x 0,01 25,18 251,8 x 0,001 C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: \uf06f \uf06f a) 0,48 x 2,5 > 0,48 x 10 : 4 c) 0,48 x 2,5 = 0,48 x 10 : 4 \uf06f d) 0,84 x 0,25 > 0,84 : 4 \uf06f e) 0,84 x 0,25 = 0,84 : 4 g) 0,84 x 0,25 < 0,84 : 4 \uf06f 55","C\u00e2u 5: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t b) 92 : 36 \u2013 29 : 36 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. a) 83 : 25 + 38 : 25 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. = \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. = \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. = \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. C\u00e2u 6: T\u00ecm x a) x : 0,25 \u2013 x = 15,6 b) x : 0,1\uf02d x : 4 \uf02d x \uf0b4 3 \uf03d 2,25 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. 4 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. C\u00e2u 7: M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi l\u00e0 120m, c\u00f3 chi\u1ec1u r\u1ed9ng b\u1eb1ng 3 chi\u1ec1u d\u00e0i. 5 a) T\u00ednh di\u1ec7n t\u00edch m\u1ea3nh v\u01b0\u1eddn \u0111\u00f3. b) Ng\u01b0\u1eddi ta chia m\u1ea3nh v\u01b0\u1eddn th\u00e0nh hai khu. Bi\u1ebft 1 di\u1ec7n t\u00edch khu tr\u1ed3ng c\u00e2y \u0103n qu\u1ea3 2 b\u1eb1ng 2 di\u1ec7n t\u00edch khu tr\u1ed3ng hoa. 5 T\u00ednh di\u1ec7n t\u00edch m\u1ed7i khu. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 56","\u0110\u1ec0 15 A C\u00e2u 1: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: A. 8,64 : 2,4 > (8,64 x 10) : (2,4 x 10) B. 8,64 : 2,4 = (8,64 x 10) : (2,4 x 10) C. 8,64 : 2,4 < (8,64 x 10) : (2,4 x 10) C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S: \uf06f a) 48 : 5,6 = 8,57 (d\u01b0 8) \uf06f b) 48 : 5,6 = 8,57 (d\u01b0 0,8) \uf06f c) 48 : 5,6 = 8,57 (d\u01b0 0,08) \uf06f d) 48 : 5,6 = 8,57 (d\u01b0 0,008) C\u00e2u 3: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: \u0110i\u1ec1n d\u1ea5u (>, =, <) v\u00e0o ch\u1ed7 ch\u1ea5m: 14,5 : 1,48\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u20261450 : 148 A. 14,5 : 1,48 > 1450 : 148 B. 14,5 : 1,48 < 1450 : 148 \uf06fB. 72 x 0,5 > 72 : 2 72 x 0,5 < 72 : 2 \uf06f C. 14,5 : 1,48 = 1450 : 148 72 x 0,5 = 72 : 2 \uf06f C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: \uf06fA. 36 : 0,5 > 36 x 2 36 : 0,5 = 36 x 2 \uf06f 36 : 0,5 < 36 x 2 \uf06f C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: \uf06fB. 48 : 0,125 > 48 : 8 \uf06fB. 48 x 0,125 = 48 : 8 \uf06fA. 24: 0,125 > 24 x 8 \uf06fB. 48 x 0,125 < 48 : 8 \uf06f24: 0,125 < 24 x 8 \uf06f24: 0,125 = 24 x 8 C\u00e2u 4: T\u00ednh: b. 9,18 : 0,5 \u2013 6,12 : 0,5 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 a. 7,14 : 1,5 + 3,06 : 1,5 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 57","\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 C\u00e2u 5: T\u00ecm x: a. x : 0,5 + x : 1,25 = 9,78 b. 2,5 x x x 6,5 = 152,75 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 C\u00e2u 8: M\u1ed9t khu \u0111\u1ea5t h\u00ecnh thoi c\u00f3 di\u1ec7n t\u00edch l\u00e0 229,4m2, c\u00f3 \u0111\u01b0\u1eddng ch\u00e9o th\u1ee9 nh\u1ea5t b\u1eb1ng 18,5m. a. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o th\u1ee9 hai c\u1ee7a khu \u0111\u1ea5t \u0111\u00f3. b. C\u1ea1nh khu \u0111\u1ea5t b\u1eb1ng 3 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o th\u1ee9 hai. Xung quang khu \u0111\u1ea5t tr\u1ed3ng c\u00e2y, c\u00e2y n\u1ecd 4 c\u00e1ch c\u00e2y kia 3,1m. H\u1ecfi ph\u1ea3i tr\u1ed3ng t\u1ea5t c\u1ea3 bao nhi\u00eau c\u00e2y. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 58","\u0110\u1ec0 15 B C\u00e2u 1: N\u1ed1i hai ph\u00e9p t\u00ednh c\u00f3 k\u1ebft qu\u1ea3 b\u1eb1ng nhau A. B. A : 100 A: 0,1 A x 100 A x 0,1 A : 1000 A : 10 A: 0,01 A x 1000 A x 0,01 A: 0,001 A x 10 A x 0,001 C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S a. 2,08 : 0,05 < 2,08 x 20 b. 2,08 : 0,05 = 2,08 x 20 c. 2,08 : 0,05 = 2,08 x 20 C\u00e2u 3: N\u1ed1i hai ph\u00e9p t\u00ednh c\u00f3 k\u1ebft qu\u1ea3 b\u1eb1ng nhau: A. 0,18 x 2 B. 0,24 : 2 0,18 : 0,2 0,24 : 0,2 0,24 : 4 0,24 : 5 0,18 : 0,5 0,18 x 4 0,24 x 0,5 0,18 : 0.25 0,18 x 5 0,24 x 0,25 C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: c) 2 1 \uf03d 2,4 a) 5 3 \uf03d 5,34 25 4 b) 5 3 \uf03d 5,75 c) 2 1 \uf03d 2,04 4 25 C\u00e2u 5: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: \u0110i\u1ec1n d\u1ea5u (>, =, <) v\u00e0o ch\u1ed7 ch\u1ea5m 36 : 0,125 \u2013 24 x 0,125 + 12 : 0,5\u2026\u2026\u2026.36 x 8 \u2013 24 + 12 x 2 A. 36 : 0,125 \u2013 24 x 0,125 + 12 : 0,5 > 36 x 8 \u2013 24 + 12 x 2 B. 36 : 0,125 \u2013 24 x 0,125 + 12 : 0,5 = 36 x 8 \u2013 24 + 12 x 2 C. 36 : 0,125 \u2013 24 x 0,125 + 12 : 0,5 < 36 x 8 \u2013 24 + 12 x 2 59","C\u00e2u 6: T\u00ecm x: a. x x 18 : 4 = 725 x 0,25 b. x x 0.125 = 3,6 \uf02b 2,8 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 8 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 C\u00e2u 7: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t (792,36 x 0,75 + 792,36 : 4) : (7,2 : 0,1 : 10) ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ C\u00e2u 8: M\u1ed9t t\u00e0u \u0111i t\u1eeb A \u0111\u1ebfn B d\u00e0i 278,9km, m\u1ed7i gi\u1eddi \u0111i \u0111\u01b0\u1ee3c 54 km. M\u1ed9t t\u00e0u ch\u1ee3 \u0111i t\u1eeb C \u0111\u1ebfn B d\u00e0i 180,5km, m\u1ed7i gi\u1edd \u0111i \u0111\u01b0\u1ee3c 30km. Hai t\u00e0u xu\u1ea5t ph\u00e1t c\u00f9ng m\u1ed9t l\u00fac. H\u1ecfi sau bao l\u00e2u th\u00ec hai t\u00e0u c\u00f9ng c\u00e1ch B m\u1ed9t kho\u1ea3ng c\u00e1ch b\u1eb1ng nhau? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 60","\u0110\u1ec0 17A C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: \uf06f A. T\u00ecm 25% c\u1ee7a 48 a) 78 x 100 : 25 = 195 b) 18 : 100 x 25 = 12 \uf06f B. T\u00ecm 0,5% c\u1ee7a 12,4 \uf06f a) 12,4 : 100 x 0,5 = 0,062 b) 12,4 x 100 : 0,5 = 2480 \uf06f C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 32m, chi\u1ec1u r\u1ed9ng b\u1eb1ng 75% chi\u1ec1u d\u00e0i. Ng\u01b0\u1eddi ta d\u00e0nh 35% di\u1ec7n t\u00edch m\u1ea3nh \u0111\u1ea5t \u0111\u1ec3 tr\u1ed3ng hoa. T\u00ednh di\u1ec7n t\u00edch ph\u1ea7n \u0111\u1ea5t tr\u1ed3ng hoa. A. 26,88m2 B. 270,8m2 C. 268,8m2 D. 286m2 C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: A. T\u00ecm m\u1ed9t s\u1ed1 bi\u1ebft 75% c\u1ee7a s\u1ed1 \u0111\u00f3 l\u00e0 24 \uf06fa) 24 : 75 x 100 = 32 \uf06fb) 24 x 75 : 100 = 18 B) T\u00ecm m\u1ed9t s\u1ed1 bi\u1ebft 4,5% c\u1ee7a s\u1ed1 \u0111\u00f3 l\u00e0 7,2 \uf06fa) 7,2 x 4,5 : 100 = 32,4 \uf06fb) 7,2 : 4,5 x 100 = 160 C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t l\u1edbp h\u1ecdc c\u00f3 22 h\u1ecdc sinh n\u1eef, chi\u1ebfm 55% s\u1ed1 h\u1ecdc sinh c\u1ea3 l\u1edbp. T\u00ednh s\u1ed1 h\u1ecdc sinh nam c\u1ee7a l\u1edbp \u0111\u00f3. A. 22 nam B. 18 nam C. 21 nam C\u00e2u 5: Trong v\u01b0\u1eddn nh\u00e0 b\u00e1c An c\u00f3 625 c\u00e2y \u0103n qu\u1ea3, g\u1ed3m hai lo\u1ea1i cam v\u00e0 chanh, trong \u0111\u00f3 48% l\u00e0 cam. 61","H\u1ecfi m\u1ed7i lo\u1ea1i c\u00f3 bao nhi\u00eau c\u00e2y ? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 6: S\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ee7a m\u1ed9t tr\u01b0\u1eddng ti\u1ec3u h\u1ecdc l\u00e0 247 em, chi\u1ebfm 19% s\u1ed1 h\u1ecdc sinh to\u00e0n tr\u01b0\u1eddng, c\u00f2n l\u1ea1i l\u00e0 lo\u1ea1i kh\u00e1 v\u00e0 lo\u1ea1i trung b\u00ecnh. H\u1ecfi s\u1ed1 h\u1ecdc sinh lo\u1ea1i kh\u00e1 v\u00e0 trung b\u00ecnh l\u00e0 bao nhi\u00eau em? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 7: M\u1ed9t c\u1eeda h\u00e0ng c\u00f3 3,125 t\u1ea5n g\u1ea1o. Ng\u00e0y th\u1ee9 nh\u1ea5t b\u00e1n \u0111\u01b0\u1ee3c 24% s\u1ed1 g\u1ea1o. Ng\u00e0y th\u1ee9 hai b\u00e1n \u0111\u01b0\u1ee3c 32% s\u1ed1 g\u1ea1o c\u00f2n l\u1ea1i. H\u1ecfi sau hai ng\u00e0y b\u00e1n c\u1eeda h\u00e0ng c\u00f2n bao nhi\u00eau ki-l\u00f4-gam g\u1ea1o? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 62","\u0110\u1ec0 17B C\u00e2u 1: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang : T\u00ecm 45% c\u1ee7a 12,8 A. 0,56 B. 5,6 C. 5,76 D. 0,576 C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S: Trong kho c\u00f3 72 t\u1ea5n g\u1ea1o n\u1ebfp v\u00e0 150 t\u1ea5n g\u1ea1o t\u1ebb. Trong m\u1ed9t ng\u00e0y b\u00e1n \u0111\u01b0\u1ee3c 25% l\u01b0\u1ee3ng g\u1ea1o n\u1ebfp v\u00e0 12% l\u01b0\u1ee3ng g\u1ea1o t\u1ebb. H\u00e3y so s\u00e1nh l\u01b0\u1ee3ng g\u1ea1o n\u1ebfp v\u00e0 g\u1ea1o t\u1ebb b\u00e1n trong ng\u00e0y h\u00f4m \u0111\u00f3. a) L\u01b0\u1ee3ng g\u1ea1o n\u1ebfp nhi\u1ec1u h\u01a1n l\u01b0\u1ee3ng g\u1ea1o t\u1ebb \uf06f b) L\u01b0\u1ee3ng g\u1ea1o n\u1ebfp \u00edt h\u01a1n l\u01b0\u1ee3ng g\u1ea1o t\u1ebb \uf06f c) L\u01b0\u1ee3ng g\u1ea1o n\u1ebfp b\u1eb1ng l\u01b0\u1ee3ng g\u1ea1o t\u1ebb \uf06f C\u00e2u 3: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: T\u00ecm m\u1ed9t s\u1ed1 bi\u1ebft 18% c\u1ee7a s\u1ed1 \u0111\u00f3 l\u00e0 2,7 A, 0,25 B. 1,5 C. 15 C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: M\u1ed9t c\u1eeda h\u00e0ng ng\u00e0y \u0111\u1ea7u b\u00e1n \u0111\u01b0\u1ee3c 25% s\u1ed1 m\u00e9t v\u1ea3i c\u00f3 trong c\u1eeda h\u00e0ng. Ng\u00e0y th\u1ee9 hai b\u00e1n \u0111\u01b0\u1ee3c 30% s\u1ed1 m\u00e9t v\u1ea3i. Sau hai ng\u00e0y b\u00e1n s\u1ed1 m\u00e9t v\u1ea3i c\u00f2n l\u1ea1i l\u00e0 972m. H\u1ecfi l\u00fac \u0111\u1ea7u c\u1ee7a h\u00e0ng c\u00f3 bao nhi\u00eau m\u00e9t v\u1ea3i? A. 1260m B. 2016m C. 2160 C\u00e2u 5: M\u1ed9t c\u1eeda h\u00e0ng \u0111\u00e3 b\u00e1n \u0111\u01b0\u1ee3c 420kg g\u1ea1o, b\u1eb1ng 10,5% t\u1ed5ng s\u1ed1 g\u1ea1o c\u1ee7a c\u1eeda h\u00e0ng. H\u1ecfi c\u1eeda h\u00e0ng c\u00f2n l\u1ea1i bao nhi\u00eau t\u1ea5n g\u1ea1o? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 63","C\u00e2u 6: Theo th\u1ed1ng k\u00ea d\u00e2n s\u1ed1 \u1edf x\u00e3 A h\u00e0ng n\u0103m t\u0103ng 1,5%. Bi\u1ebft cu\u1ed1i n\u0103m 2007 x\u00e3 A c\u00f3 40.000 ng\u01b0\u1eddi. H\u1ecfi cu\u1ed1i n\u0103m 2009 x\u00e3 A c\u00f3 bao nhi\u00eau ng\u01b0\u1eddi? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 7: M\u1ed9t l\u1edbp h\u1ecdc c\u00f3 s\u1ed1 nam b\u1eb1ng 75% s\u1ed1 n\u1eef. Cu\u1ed1i h\u1ecdc k\u00ec I l\u1edbp nh\u1eadn th\u00eam 3 em nam \u1edf n\u01a1i kh\u00e1c chuy\u1ec3n v\u1ec1 n\u00ean s\u1ed1 nam b\u1eb1ng 90% s\u1ed1 n\u1eef. H\u1ecfi sau khi nh\u1eadn th\u00eam l\u1edbp h\u1ecdc c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau em? B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 64","\u0110\u1ec0 18A C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: \uf06fa) Trong h\u00ecnh, tam gi\u00e1c ABC c\u00f3 \u0111\u00e1y BE, chi\u1ec1u cao AH \uf06fb) Trong h\u00ecnh, tam gi\u00e1c ABC c\u00f3 \u0111\u00e1y BC, chi\u1ec1u cao AE \uf06fc) Trong h\u00ecnh, tam gi\u00e1c ABC c\u00f3 \u0111\u00e1y EC, chi\u1ec1u cao AB \uf06fd) Trong h\u00ecnh, tam gi\u00e1c ABC c\u00f3 \u0111\u00e1y BC, chi\u1ec1u cao AH A B HE C C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t t\u1ea5m bia h\u00ecnh tam gi\u00e1c c\u00f3 \u0111\u00e1y d\u00e0i 6,2dm, chi\u1ec1u cao 22cm. T\u00ednh di\u1ec7n t\u00edch t\u1ea5m b\u00eca \u0111\u00f3. A. 13,64dm2 B. 6,82dm2 C. 68,2dm2 C\u00e2u 3: \u0110\u00fang ghi \u0110, sau ghi S: a) M\u1ed9t tam gi\u00e1c c\u00f3 th\u1ec3 c\u00f3 ba g\u00f3c nh\u1ecdn \uf06f b) M\u1ed9t tam gi\u00e1c c\u00f3 th\u1ec3 c\u00f3 hai g\u00f3c t\u00f9 v\u00e0 m\u1ed9t g\u00f3c nh\u1ecdn c) M\u1ed9t tam gi\u00e1c c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t g\u00f3c vu\u00f4ng v\u00e0 hai g\u00f3c nh\u1ecdn \uf06f d) M\u1ed9t tam gi\u00e1c c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t g\u00f3c vu\u00f4ng, m\u1ed9t g\u00f3c t\u00f9, m\u1ed9t g\u00f3c nh\u1ecdn \uf06f e) M\u1ed9t tam gi\u00e1c c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t g\u00f3c t\u00f9 v\u00e0 hai g\u00f3c nh\u1ecdn \uf06f \uf0a8 C\u00e2u 3: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t t\u1ea5m bia h\u00ecnh tam gi\u00e1c c\u00f3 di\u1ec7n t\u00edch l\u00e0 53,55m2 v\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 12,6m. T\u00ednh chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng c\u1ee7a tam gi\u00e1c \u0111\u00f3. A. 4,25m B. 0,85m C. 8,5m C\u00e2u 4: T\u00ednh di\u1ec7n t\u00edch m\u1ed9t b\u1ed3n hoa h\u00ecnh tam gi\u00e1c c\u00f3 \u0111\u00e1y l\u00e0 2,4m v\u00e0 chi\u1ec1u cao l\u00e0 15dm. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ 65","................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 6: M\u1ed9t c\u01a1 quan ph\u1ea3i l\u00e0m 240 l\u00e1 c\u1edd th\u1ec3 thao h\u00ecnh tam gi\u00e1c vu\u00f4ng c\u00f3 hai c\u1ea1nh g\u00f3c vu\u00f4ng d\u00e0i 10cm v\u00e0 20cm. H\u1ecfi c\u1ea7n mua \u00edt nh\u1ea5t bao nhi\u00eau t\u1edd gi\u1ea5y m\u00e0u h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ec3 l\u00e0m c\u1edd bi\u1ebft r\u1eb1ng m\u1ed7i t\u1edd gi\u1ea5y m\u00e0u c\u00f3 chi\u1ec1u d\u00e0i 0,8m v\u00e0 chi\u1ec1u r\u1ed9ng 0,6m. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 7: Cho tam gi\u00e1c vu\u00f4ng ABC c\u00f3 hai c\u1ea1nh g\u00f3c vu\u00f4ng AB = 4,5cm, AC = 6cm. C\u1ea1nh huy\u1ec1n BC = 7,5cm. Tinh chi\u1ec1u cao AH c\u1ee7a h\u00ecnh tam gi\u00e1c vu\u00f4ng ABC. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 66","\u0110\u1ec0 18B C\u00e2u 1: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: A. \u0110\u01b0\u1eddng cao AH, \u0111\u00e1y BC A B. \u0110\u01b0\u1eddng cao AH, \u0111\u00e1y HC C. \u0110\u01b0\u1eddng cao CN, \u0111\u00e1y AB M D. \u0110\u01b0\u1eddng cao BM, \u0111\u00e1y AC H B C E. \u0110\u01b0\u1eddng cao BC, \u0111\u00e1y AN N C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: H\u00ecnh tam gi\u00e1c c\u00f3 di\u1ec7n t\u00edch 136cm2, chi\u1ec1u cao 16cm. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh tam gi\u00e1c \u0111\u00f3. \uf0a8a) 136 : 16 = 8,5(cm) b)136\uf0b4 2 \uf03d 17 (cm) \uf0a8 16 C\u00e2u 3: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: So s\u00e1nh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c ACD v\u1edbi di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c ABG, bi\u1ebft BC=CD=DE = EC A. 1 B. 1 C. 1 D. 1 23 4 5 A B CD E G C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Cho h\u00ecnh ch\u1eef nh\u1eadt ABCD c\u00f3 AB = 6cm, AD = 3,6cm.. T\u00ednh di\u1ec7n t\u00edch tam gi\u00e1c BEC. A. 18cm2 B. 21,6 cm2 C. 10,8 cm2 C. 1,08 cm2 AB E DC 67","C\u00e2u 5: M\u1ed9t chi\u1ebfc kh\u0103n qu\u00e0ng \u0111\u1ecf h\u00ecnh tam gi\u00e1c c\u00f3 t\u1ed5ng \u0111\u1ed9 d\u00e0i \u0111\u00e1y v\u00e0 chi\u1ec1u cao b\u1eb1ng 80cm. Chi\u1ec1u cao b\u1eb1ng 25% \u0111\u1ed9 d\u00e0i \u0111\u00e1y. T\u00ednh di\u1ec7n t\u00edch chi\u1ebfc kh\u0103n qu\u00e0ng \u0111\u1ecf \u0111\u00f3. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 6: Cho h\u00ecnh vu\u00f4ng ABCD c\u00f3 c\u1ea1nh b\u1eb1ng 4,8cm. Tr\u00ean c\u1ea1nh AB l\u1ea5y trung \u0111i\u1ec3m E. Tr\u00ean BC l\u1ea5y \u0111i\u1ec3m G sao cho GC \uf03d 1 BC . 4 T\u00ednh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c DEG. AEB G D C B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 68","\u00d4N T\u1eacP H\u1eccC K\u00cc I \u0110\u1ec0 1A C\u00e2u 1: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Vi\u1ebft s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 ch\u1ea5m: 5m28cm2 =\u2026\u2026\u2026.m2 A. 5,8m2 B. 5,08m2 C. 5,008m2 D. 5,0008m2 C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S: a) 52,8 \u2013 14,3 + 5,7 b) 52,8 \u2013 14,3 + 5,7 = 52,8 \u2013 20 = 38,5 + 5,7 = 32,8 \uf0a8 = 44,2 \uf0a8 C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: 1,08km \uf0a8 0,648km \uf0a8 a) 48m + 0,6km = ? 48,6km \uf0a8 b) 0,124 t\u1ea5n \u2013 0,42 t\u1ea1 = ? 1,198 t\u1ea5n \uf0a8 0,82 t\u1ea5n \uf0a8 0,082 t\u1ea5n \uf0a8 C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 42m, chi\u1ec1u r\u1ed9ng b\u1eb1ng 3 chi\u1ec1u d\u00e0i. 5 T\u00ednh chu vi m\u1ea3nh v\u01b0\u1eddn \u0111\u00f3. A. 67,2m B. 130m C. 134m C\u00e2u 5: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t v\u1eadn \u0111\u1ed9ng vi\u00ean \u0111i xe \u0111\u1ea1p trong 1,5 gi\u1edd \u0111\u01b0\u1ee3c 66km. H\u1ecfi c\u1ee9 \u0111i nh\u01b0 th\u1ebf trong 2,5 gi\u1edd \u0111\u01b0\u1ee3c bao nhi\u00eau ki-l\u00f4-m\u00e9t? A. 88km B. 100km C. 110km D. 120km C\u00e2u 6: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t: a) 125,36 \u2013 8,75 \u2013 21,75 b) 72,8 \u2013 34,9 + 22,9 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. 69","c) 7, 8 x 1,5 + 2,2 x 1,5 c) 4,52 : 9 \u2013 1,46 : 9 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. C\u00e2u 7: T\u00ecm x a) 7,2 + x : 4 = 10,8 b) x \uf0b4 4 - 7,2 = 10,8 =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. C\u00e2u 8: T\u1ed5ng s\u1ed1 g\u1ea1o hai bao l\u00e0 91,2kg. N\u1ebfu chuy\u1ec3n t\u1eeb bao th\u1ee9 nh\u1ea5t sang bao th\u1ee9 hai 2,7kg th\u00ec s\u1ed1 ki-l\u00f4-gam g\u1ea1o c\u00f3 trong m\u1ed7i bao b\u1eb1ng nhau. H\u1ecfi l\u00fac \u0111\u1ea7u m\u1ed7i bao c\u00f3 bao nhi\u00eau ki-l\u00f4-gam g\u1ea1o. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 9: M\u1ed9t c\u00e1i s\u00e2n h\u00ecnh vu\u00f4ng c\u00f3 chu vi l\u00e0 30m. T\u00ednh di\u1ec7n t\u00edch c\u00e1c s\u00e2n \u0111\u00f3. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 70","\u0110\u1ec0 1B C\u00e2u 1: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Vi\u1ebft s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 ch\u1ea5m: 0,86ha \u2013 632m2 =\u2026\u2026\u2026.m2 A. 228m2 B. 7968m2 C. 796,8m2 C\u00e2u 2: \u0110\u00fang ghi \u0110, sai ghi S: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t. a) 8,2 t\u1ea5n \u2013 0,65 t\u1ea1 - 35kg b) 8,2 t\u1ea5n \u2013 0,65 t\u1ea1 - 35kg = 820kg \u2013 65kg \u2013 35kg = 8200kg \u2013 65kg \u2013 35kg = 820kg \u2013 (65kg + 35kg) = 8200kg \u2013 (65kg + 35kg) = 820kg \u2013 100kg = 8200kg \u2013 100kg = 720kg \uf0a8 = 8100kg \uf0a8 C\u00e2u 3: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t c\u1eeda h\u00e0ng c\u00f3 3 t\u1ea5n g\u1ea1o n\u1ebfp. Bu\u1ed5i s\u00e1ng b\u00e1n \u0111\u01b0\u1ee3c 3 l\u01b0\u1ee3ng g\u1ea1o \u0111\u00f3. H\u1ecfi c\u1eeda h\u00e0ng 45 c\u00f2n l\u1ea1i bao nhi\u00eau t\u1ea1 g\u1ea1o n\u1ebfp? A. 0,3 t\u1ea1 \uf0a8 B. 30 t\u1ea1 \uf0a8 C. 3 t\u1ea1 \uf0a8 C\u00e2u 4: \u0110\u00fang ghi \u0110, sai ghi S: T\u00ecm x : 1,2 \u2013 3,4 + x = 5,6 a) x = 4,5 \uf0a8 b) x = 0,78 \uf0a8 c) x = 7,8 \uf0a8 C\u00e2u 5: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t: 1,2 + 2,1 + 3,4 + 4,3 + 5,6 + 6,5 + 7,8 + 8,7 = ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ 71","................................................................................................................................................ C\u00e2u 7: T\u00ecm x a) x \uf0b4 1,2 : 0,5 = 7,2 b) x : 1,2 \uf0b4 0,5 = 7,2 \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. C\u00e2u 7: T\u00ecm m\u1ed9t s\u1ed1 th\u1eadp ph\u00e2n A bi\u1ebft r\u1eb1ng n\u1ebfu chuy\u1ec3n d\u1ea5u ph\u1ea9y c\u1ee7a n\u00f3 sang b\u00ean tr\u00e1i m\u1ed9t h\u00e0ng ta \u0111\u01b0\u1ee3c s\u1ed1 B. N\u1ebfu chuy\u1ec3n d\u1ea5u ph\u1ea9y c\u1ee7a n\u00f3 sang b\u00ean ph\u1ea3i m\u1ed9t h\u00e0ng ta \u0111\u01b0\u1ee3c s\u1ed1 C. T\u1ed5ng c\u1ee7a ba s\u1ed1 A, B, C l\u00e0 221,778. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 72","\u0110\u1ec0 2A C\u00e2u 1: N\u1ed1i c\u00e1c bi\u1ec3u th\u1ee9c v\u1edbi gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c \u0111\u00f3: 9,6 x 2,4 x 0,25 9,6 x 2,4 : 0,25 9,6 : 2,4 : 0,25 92,16 1 5.76 16 9,6 : 0,25 x 2,4 9,6 : 0,25 : 2,4 9,6 : 2,4 x 0,25 C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: A. 7,5 : 12,5 x 8 = 7,5 : 100 = 0,075 B. 7,5 : 12,5 x 8 = 7,5 x 100 = 750 C. 7,5 : 12,5 x 8 = 0,6 x 8 = 4,8 D. 7,5 : 12,5 x 8 = 0,6 : 8 = 0,075 C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: \u0110i\u1ec1n d\u1ea5u (>, =, <) v\u00e0o ch\u1ed7 ch\u1ea5m: 8,4m2 x 8 : 0,5\u2026\u2026\u2026\u2026840dm2 : 0,125 x 2 8,4m2 x 8 : 0,5 > 840dm2 : 0,125 x 2 \uf0a8 8,4m2 x 8 : 0,5 = 840dm2 : 0,125 x 2 \uf0a8 8,4m2 x 8 : 0,5 < 840dm2 : 0,125 x 2 \uf0a8 C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Hi\u1ec7u c\u1ee7a hai s\u1ed1 l\u00e0 0,75. Th\u01b0\u01a1ng c\u1ee7a hai s\u1ed1 \u0111\u00f3 c\u0169ng b\u1eb1ng 0,75. T\u00ecm s\u1ed1 b\u00e9. A. 0,025 B. 2,25 C. 22,5 C\u00e2u 5: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: M\u1ed9t t\u1edd b\u00eca h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch l\u00e0 0,25m2. T\u00ednh chu vi t\u1edd b\u00eca \u0111\u00f3. A. 0,5m B. 5m C. 2m D. 0,2m C\u00e2u 6: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t: a) 21,6 \uf0b4 1,25 \uf0b4 8 b) 16,8 \uf0b4 0,125 : 0,5 = \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. 73","=\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. C\u00e2u 7: T\u00ecm x: a) x \uf0b4 2,4 : 2,5 = 1,44 b) x : 2,4 : 2,5 = 1,44 = \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. =\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. C\u00e2u 8: Th\u00f9ng to c\u00f3 21 l\u00edt n\u01b0\u1edbc m\u1eafm. Th\u00f9ng b\u00e9 c\u00f3 15 l\u00edt n\u01b0\u1edbc m\u1eafm. N\u01b0\u1edbc m\u1eafm \u0111\u01b0\u1ee3c ch\u1ee9a v\u00e0o chai nh\u01b0 nhau, m\u1ed7i chai 0,75 l\u00edt. H\u1ecfi t\u1ea5t c\u1ea3 bao nhi\u00eau chai n\u01b0\u1edbc m\u1eafm (gi\u1ea3i b\u1eb1ng hai c\u00e1ch) B\u00e0i gi\u1ea3i C\u00e1ch 1: ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ C\u00e1ch 2: ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 74","\u0110\u1ec0 2A C\u00e2u 1: \u0110\u00fang ghi \u0110, sai ghi S: \u0110i\u1ec1n d\u1ea5u (>, =, <) v\u00e0o ch\u1ed7 ch\u1ea5m: 25% c\u1ee7a 48\u2026\u2026\u2026\u202648% c\u1ee7a 25 a) 25% c\u1ee7a 48 > 48% c\u1ee7a 25 \uf0a8 b) 25% c\u1ee7a 48 < 48% c\u1ee7a 25 \uf0a8 c) 25% c\u1ee7a 48 = 48% c\u1ee7a 25 \uf0a8 C\u00e2u 2: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: T\u00ecm m\u1ed9t s\u1ed1 bi\u1ebft 18% c\u1ee7a s\u1ed1 \u0111\u00f3 l\u00e0 13,5 A. 24,3 B. 243 C.75 D. 750 C\u00e2u 3: \u0110\u00fang ghi \u0110, sai ghi S: 2,75 : 0,125 > 2,75 x 8 \uf0a8 2,75 : 0,125 < 2,75 x 8 \uf0a8 2,75 : 0,125 = 2,75 x 8 \uf0a8 C\u00e2u 4: Khoanh v\u00e0o ch\u1eef \u0111\u1eb7t tr\u01b0\u1edbc c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang: Cho tam gi\u00e1c ABC c\u00f3 \u0111\u00e1y BC d\u00e0i 1,2m. N\u1ebfu k\u00e9o \u0111\u00e1y BC d\u00e0i th\u00eam 0,8m n\u1eefa th\u00ec di\u1ec7n t\u00edch t\u0103ng th\u00eam 1m2. A. 2m2 B. 3m2 C. 1,5m2 D. 2,5m2 C\u00e2u 5: \u0110\u00fang ghi \u0110, sai ghi S: a) x + x \uf0b4 0,25 = 4,8 b) x + x \uf0b4 0,25 = 4,8 x \uf0b4 2 \uf0b4 0,25 = 4,8 x \uf0b4 1 + x \uf0b4 0,25 = 4,8 x \uf0b4 2 = 4,8 : 0,25 x \uf0b4 (1 + 0,25) = 4,8 x \uf0b4 2 = 19,2 x \uf0b4 1,25 = 4,8 x = 19,2 : 2 x = 4,8 : 1,25 x = 9,6 \uf0a8 x = 3,84 \uf0a8 C\u00e2u 6: T\u00ednh b\u1eb1ng c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t: 2,4 : 0,125 + 2,4 : 0,25 \u2013 2,4 : 0,5 ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ 75","................................................................................................................................................ C\u00e2u 7: T\u00ecm s\u1ed1 th\u1eadp ph\u00e2n a, bc bi\u1ebft: 14a, bc : 81 \uf03d a, bc ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ C\u00e2u 8: Bu\u1ed5i s\u00e1ng m\u1eb9 Khu\u00ea \u0111em th\u00f3c ra ph\u01a1i, chi\u1ec1u thu l\u1ea1i \u0111\u01b0\u1ee3c 4351kg. T\u00ednh ra hao m\u1ea5t 5%. H\u1ecfi bu\u1ed5i s\u00e1ng m\u1eb9 Khu\u00ea ph\u01a1i bao nhi\u00eau ki-l\u00f4-gam th\u00f3c. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. C\u00e2u 9: Cho tam gi\u00e1c ABC c\u00f3 di\u1ec7n t\u00edch 36cm2. Tr\u00ean AB l\u1ea5y m\u1ed9t \u0111i\u1ec3m M sao cho AM \uf03d 1 AB . Tr\u00ean c\u1ea1nh AC l\u1ea5y m\u1ed9t \u0111i\u1ec3m N \u1edf ch\u00ednh gi\u1eefa. N\u1ed1i M v\u1edbi N\/. T\u00ednh di\u1ec7n t\u00edch tam 3 gi\u00e1c AMN. B\u00e0i gi\u1ea3i ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ ................................................................................................................................................ \u0110\u00e1p s\u1ed1: ............................................. 76"]