["sachhoc.com To\u00e1n l\u1edbp 3 Ta c\u00f3: x : 3 + 24 = 51 x : 3 = 51 \u2013 24 x : 3 = 27 x = 27 \uf0b4 3 x = 81 \u0110\u00e1p s\u1ed1: 81. C\u00e2u 11. H\u00ecnh v\u1ebd c\u00f3 8 g\u00f3c vu\u00f4ng. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 8 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 6 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. A C\u00e2u 2. C C\u00e2u 3. B C\u00e2u 4. C C\u00e2u 5. D C\u00e2u 6. A II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 243 34 879 3 765 9 \uf02d \uf0b48 6 293 72 85 27 198 272 27 45 45 09 45 9 0 0 C\u00e2u 8. b. 47 : x = 3 (d\u01b0 2) a. 122 : x = 98 \u2013 96 x = (47 \u2013 2) : 3 x = 45 : 3 122 : x = 2 x = 15. x = 122 : 2 x = 61. \u0110\u00e1p s\u1ed1: x = 15. \u0110\u00e1p s\u1ed1: x = 61. C\u00e2u 9. B\u00e0i gi\u1ea3i H\u00f9ng cho em s\u1ed1 quy\u1ec3n truy\u1ec7n l\u00e0: 24 : 6 = 4 (quy\u1ec3n truy\u1ec7n) H\u00f9ng c\u00f2n l\u1ea1i s\u1ed1 quy\u1ec3n truy\u1ec7n l\u00e0: 24 \u2013 6 = 18 (quy\u1ec3n truy\u1ec7n) \u0110\u00e1p s\u1ed1: 18 quy\u1ec3n truy\u1ec7n. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 9 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 C\u00e2u 10. T\u00edch c\u00e1c s\u1ed1 b\u1eb1ng 18: 18 = 2 \uf0b4 9; 18 = 3 \uf0b4 6. V\u00ec hi\u1ec7u gi\u1eefa ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c v\u00e0 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 7 n\u00ean s\u1ed1 c\u1ea7n t\u00ecm l\u00e0: 92. \u0110\u00e1p s\u1ed1: 92. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 10 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 7 799 3 6 266 I. Tr\u1eafc nghi\u1ec7m: 19 18 B\u00e0i 1. B B\u00e0i 2. C B\u00e0i 3. A B\u00e0i 4. C 19 18 II. T\u1ef1 lu\u1eadn: 1 B\u00e0i 5. 902 236 928 4 \uf02d \uf0b44 8 232 944 12 379 12 523 08 8 0 B\u00e0i 6. B\u00e0i gi\u1ea3i S\u1ed1 chi\u1ebfc xe b\u00e1n \u0111\u01b0\u1ee3c trong bu\u1ed5i chi\u1ec1u l\u00e0: 70 \uf0b4 3 = 210 (chi\u1ebfc xe) \u0110\u00e1p s\u1ed1: 210 chi\u1ebfc xe. B\u00e0i 7. B\u00e0i gi\u1ea3i Chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: 36 : 2 = 18 (m) Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: (36 + 18) \uf0b4 2 = 108 (m) \u0110\u00e1p s\u1ed1: 108 m. B\u00e0i 8. S\u1ed1 b\u00e9 nh\u1ea5t l\u00e0: 307. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 11 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 8 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. B C\u00e2u 2. C C\u00e2u 3. B C\u00e2u 4. D C\u00e2u 5. A C\u00e2u 6. B II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 436 951 3 567 4 \uf0b42 9 317 4 141 872 05 3 16 21 16 21 07 0 4 3 C\u00e2u 8. a. 134 \uf0b4 (78 \u2013 75) = 134 \uf0b4 3 = 402 b. (690 \u2013 234 ) : 8 = 456 : 8 = 57 C\u00e2u 9. B\u00e0i gi\u1ea3i S\u1ed1 c\u00e2y cam trong v\u01b0\u1eddn l\u00e0: 48 \u2013 40 = 8 (c\u00e2y) C\u00e2y b\u01b0\u1edfi g\u1ea5p c\u00e2y cam s\u1ed1 l\u1ea7n l\u00e0: 48 : 8 = 6 (l\u1ea7n) \u0110\u00e1p s\u1ed1: 6 l\u1ea7n. C\u00e2u 10. T\u1ed5ng 2 s\u1ed1 g\u1ea5p 3 l\u1ea7n s\u1ed1 th\u1ee9 nh\u1ea5t N\u00ean s\u1ed1 th\u1ee9 hai g\u1ea5p 2 l\u1ea7n s\u1ed1 th\u1ee9 nh\u1ea5t, hay s\u1ed1 th\u1ee9 nh\u1ea5t b\u1eb1ng 1 s\u1ed1 th\u1ee9 hai. 2 S\u1ed1 th\u1ee9 nh\u1ea5t l\u00e0: 48 : 2 = 24. \u0110\u00e1p s\u1ed1: 24. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 12 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 9 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. C C\u00e2u 2. D C\u00e2u 3. C C\u00e2u 4. A II. T\u1ef1 lu\u1eadn: C\u00e2u 5. a. 80dam 6m = 806m; b. 5l + 27l = 32l; c. 1 c\u1ee7a 12 gi\u1edd l\u00e0 4 gi\u1edd. 3 C\u00e2u 6. a. x : 7 = 25 + 29 b. 405 \u2013 x = 234 : 2 x : 7 = 54 405 \u2013 x = 117 x = 54 \uf0b4 7 x = 405 \u2013 117 x = 378. x = 288. \u0110\u00e1p s\u1ed1: x = 378. \u0110\u00e1p s\u1ed1: x = 288. C\u00e2u 7. B\u00e0i gi\u1ea3i C\u00f4 gi\u00e1o ph\u00e1t ph\u1ea7n th\u01b0\u1edfng cho h\u1ecdc sinh h\u1ebft s\u1ed1 quy\u1ec3n v\u1edf l\u00e0: 35 : 5 = 7 (quy\u1ec3n v\u1edf) C\u00f4 gi\u00e1o c\u00f2n l\u1ea1i s\u1ed1 quy\u1ec3n v\u1edf l\u00e0: 35 \u2013 7 = 28 (quy\u1ec3n v\u1edf) \u0110\u00e1p s\u1ed1: 28 quy\u1ec3n v\u1edf. C\u00e2u 8. B\u00e0i gi\u1ea3i Chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: 6 x 5 = 30 (m) Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: (30 + 6) x 2 = 72 (m) \u0110\u00e1p s\u1ed1: 72m. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 13 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 C\u00e2u 9. G\u1ecdi s\u1ed1 \u0111\u00f3 l\u00e0 a. Ta c\u00f3: a \uf0b4 3 + 64 = 88 a \uf0b4 3 = 88 \u2013 64 a \uf0b4 3 = 24 a = 24 : 3 a =8 \u0110\u00e1p s\u1ed1: 8. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 14 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 10 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. D C\u00e2u 2. A C\u00e2u 3. B C\u00e2u 4. B C\u00e2u 5. B C\u00e2u 6. D II. T\u1ef1 lu\u1eadn: C\u00e2u 1. 688 249 148 750 6 \uf02d \uf02b \uf0b44 6 125 15 209 556 592 12 479 805 30 30 0 C\u00e2u 2. a. x : 7 = 104 \u2013 3 b. 559 \u2013 x = 289 \u2013 5 x : 7 = 101 559 \u2013 x = 284 x = 101 \uf0b4 7 x = 559 \u2013 284 x = 707. x = 275. \u0110\u00e1p s\u1ed1: x = 707. \u0110\u00e1p s\u1ed1: x = 275. C\u00e2u 3. a. 3m5dm = 350cm; b. 4hm 40m = 440m; c. 8dam 50dm = 85m. C\u00e2u 4. B\u00e0i gi\u1ea3i S\u1ed1 con g\u00e0 m\u00e1i l\u00e0: 40 : 8 = 5 (con g\u00e0) \u0110\u00e0n g\u00e0 c\u00f3 s\u1ed1 con g\u00e0 tr\u1ed1ng v\u00e0 g\u00e0 m\u00e1i l\u00e0: 40 + 5 = 45 (con g\u00e0) \u0110\u00e1p s\u1ed1: 45 con g\u00e0. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 15 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 16 \u0110\u1ec0 S\u1ed0 11 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. C C\u00e2u 2. D C\u00e2u 3. C C\u00e2u 4. A C\u00e2u 5. C C\u00e2u 6. B II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 395 597 154 495 5 \uf02b \uf02d \uf0b44 45 99 616 437 248 45 832 349 45 0 C\u00e2u 8. b. x \uf0b4 7 = 200 - 25 a. 456 : x = 4 x \uf0b4 7 = 175 x = 175 : 7 x = 456 : 4 x = 25. x = 114. \u0110\u00e1p s\u1ed1: x = 114. \u0110\u00e1p s\u1ed1: x = 25. C\u00e2u 9. B\u00e0i gi\u1ea3i M\u1ed7i \u0111o\u1ea1n d\u00e2y d\u00e0i l\u00e0: 64 : 8 = 8 (m) Cu\u1ed9n 720m th\u00ec \u0111\u01b0\u1ee3c c\u1eaft th\u00e0nh s\u1ed1 \u0111o\u1ea1n d\u00e2y l\u00e0: 720 : 8 = 90 (\u0111o\u1ea1n) \u0110\u00e1p s\u1ed1: 90 \u0111o\u1ea1n. C\u00e2u 10. B\u00e0i gi\u1ea3i. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 G\u1ecdi s\u1ed1 H\u00f9ng ngh\u0129 l\u00e0 x. S\u1ed1 tr\u00f2n ch\u1ee5c l\u1edbn nh\u1ea5t c\u00f3 ba ch\u1eef s\u1ed1 l\u00e0 990. 990 \u2013 x = 348 x = 990 \u2013 348 x = 642 \u0110\u00e1p s\u1ed1: S\u1ed1 H\u00f9ng ngh\u0129 l\u00e0 642. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 17 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 12 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. A C\u00e2u 2. D C\u00e2u 3. B C\u00e2u 4. B C\u00e2u 5. C C\u00e2u 6. A II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 444 243 153 584 4 \uf02d \uf02b \uf0b45 4 146 765 18 364 139 16 80 382 24 24 0 C\u00e2u 8. a. y : 32 = 5 + 3 b. y \uf0b4 5 = 100 \u2013 45 y : 32 = 8 y \uf0b4 5 = 55 y = 8 \uf0b4 32 y = 55 : 5 y = 256. y = 11. \u0110\u00e1p s\u1ed1: y = 256. \u0110\u00e1p s\u1ed1: y = 11. C\u00e2u 9. B\u00e0i gi\u1ea3i S\u1ed1 g\u1ea1o c\u1eeda h\u00e0ng c\u00f2n l\u1ea1i sau khi b\u00e1n l\u00e0: 567 \u2013 87 = 480 (kg) M\u1ed7i t\u00fai c\u00f3 s\u1ed1 ki-l\u00f4-gam g\u1ea1o l\u00e0: 480 : 8 = 60 (kg) \u0110\u00e1p s\u1ed1: 60kg. C\u00e2u 10. \uf02850\uf02d5\uf029\uf0b44 \uf02d70 H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 18 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 13 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. B C\u00e2u 2. D C\u00e2u 3. A C\u00e2u 4. B C\u00e2u 5. C II. T\u1ef1 lu\u1eadn: C\u00e2u 6. 345 465 295 468 4 \uf02b \uf02d \uf0b43 4 117 06 228 259 885 4 573 206 28 28 0 C\u00e2u 7. a. 315 + x = 981 : 3 b. x : 3 = 350 \u2013 21 315 + x = 327 x : 3 = 329 x = 327 \u2013 315 x = 329 \uf0b4 3 x = 12. x = 987. \u0110\u00e1p s\u1ed1: x = 987. \u0110\u00e1p s\u1ed1: x = 12. C\u00e2u 8. B\u00e0i gi\u1ea3i M\u1ed7i h\u00e0ng c\u00f3 s\u1ed1 h\u1ecdc sinh l\u00e0: 45 : 5 = 9 (h\u1ecdc sinh) 225 h\u1ecdc sinh x\u1ebfp \u0111\u01b0\u1ee3c v\u00e0o s\u1ed1 h\u00e0ng nh\u01b0 th\u1ebf l\u00e0: 225 : 9 =25 (h\u00e0ng) \u0110\u00e1p s\u1ed1: 25 h\u00e0ng. C\u00e2u 9. 225 x 3 = 675 H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 19 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 14 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. A C\u00e2u 2. D C\u00e2u 3. C C\u00e2u 4. D C\u00e2u 5. C C\u00e2u 6. C II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 456 485 104 549 4 \uf02b \uf02d \uf0b47 4 137 728 14 127 138 12 583 347 29 28 1 C\u00e2u 8. b. x : 7 = 24 (d\u01b0 2) a. 634 \u2013 x = 327 : 3 x = 24 \uf0b4 7 + 2 x = 168 + 2 634 \u2013 x = 109 x = 170. x = 634 \u2013 109 x = 525. \u0110\u00e1p s\u1ed1: x = 170. \u0110\u00e1p s\u1ed1: x = 525. C\u00e2u 9. B\u00e0i gi\u1ea3i S\u1ed1 h\u1ecdc sinh c\u1ee7a l\u1edbp \u0111i thi h\u1ecdc sinh gi\u1ecfi l\u00e0: 54 : 9 = 6 (h\u1ecdc sinh) L\u1edbp c\u00f2n s\u1ed1 h\u1ecdc sinh kh\u00f4ng \u0111i thi h\u1ecdc sinh gi\u1ecfi l\u00e0: 54 \u2013 6 = 48 (h\u1ecdc sinh) \u0110\u00e1p s\u1ed1: 48 h\u1ecdc sinh. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 20 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 C\u00e2u 10. B\u00e0i gi\u1ea3i G\u1ecdi s\u1ed1 \u0111\u00f3 l\u00e0 a. a \uf0b4 3 + 8 = 593 a \uf0b4 3 = 593 \u2013 8 a \uf0b4 3 = 585 a = 585 : 3 a = 195. \u0110\u00e1p s\u1ed1: 195. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 21 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 15 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. D C\u00e2u 2. A C\u00e2u 3. B C\u00e2u 4. D C\u00e2u 5. C C\u00e2u 6. D II. T\u1ef1 lu\u1eadn: C\u00e2u 6. 496 144 174 3 665 7 \uf02b \uf02d 99 15 58 63 95 249 45 24 35 745 24 35 C\u00e2u 7. 0 0 a. 345 : x = 132 \u2013 127 b. x \u2013 123 = 235 : 5 x \u2013 123 = 47 345 : x = 5 x = 47 + 123 x = 170. x = 345 : 5 \u0110\u00e1p s\u1ed1: x =170. x = 69. \u0110\u00e1p s\u1ed1: x = 69. C\u00e2u 8. B\u00e0i gi\u1ea3i L\u1edbp 3A c\u00f3 s\u1ed1 h\u1ecdc sinh l\u00e0: 99 : 3 = 33 (h\u1ecdc sinh) L\u1edbp 3B c\u00f3 s\u1ed1 h\u1ecdc sinh l\u00e0: 99 \u2013 33 = 66 (h\u1ecdc sinh) \u0110\u00e1p s\u1ed1: 66 h\u1ecdc sinh. C\u00e2u 9. .12 \uf0b4 9 \uf02d 8 \uf03d 100. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 22 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 16 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. B C\u00e2u 2. C C\u00e2u 3. D C\u00e2u 4. A C\u00e2u 5. A C\u00e2u 6. B II. T\u1ef1 lu\u1eadn: C\u00e2u 7. a. 243 : x = 341 \u2013 338 b. x \uf0b4 6 = 28 + 8 243 : x = 3 x \uf0b4 6 = 36 x = 243 : 3 x = 36 : 6 x = 81. x = 6. \u0110\u00e1p s\u1ed1: x = 81. \u0110\u00e1p s\u1ed1: x = 6. C\u00e2u 8. B\u00e0i gi\u1ea3i H\u00f9ng cho T\u00fa s\u1ed1 vi\u00ean bi l\u00e0: 68 : 4 = 17 (vi\u00ean bi) H\u00f9ng c\u00f2n l\u1ea1i s\u1ed1 vi\u00ean bi l\u00e0: 68 \u2013 17 = 51 (vi\u00ean bi) \u0110\u00e1p s\u1ed1: 51 vi\u00ean bi. C\u00e2u 9. B\u00e0i gi\u1ea3i S\u1ed1 quy\u1ec3n v\u1edf c\u1ee7a Ng\u1ecdc l\u00e0: 34 \uf0b4 3 = 102 (quy\u1ec3n v\u1edf) T\u1ed5ng s\u1ed1 quy\u1ec3n v\u1edf c\u1ee7a Ng\u1ecdc v\u00e0 B\u00ecnh l\u00e0: 34 + 102 = 136 (quy\u1ec3n v\u1edf) H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 23 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u00e1p s\u1ed1: 136 quy\u1ec3n v\u1edf. C\u00e2u 10. x : 5 : 2 = 15 x : 5 = 15 \uf0b4 2 x : 5 = 30 x = 30 \uf0b4 5 x = 150. \u0110\u00e1p s\u1ed1: x = 150. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 24 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 17 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. B C\u00e2u 2. B C\u00e2u 3. A C\u00e2u 4. A C\u00e2u 5. C C\u00e2u 6. C II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 131 325 107 364 4 \uf02b \uf02d \uf0b48 36 91 856 139 139 04 270 186 B\u00e0i gi\u1ea3i 4 0 C\u00e2u 8. b. x : 7 = 72 \u2013 59 x : 7 = 13 An \u0111\u1ecdc \u0111\u01b0\u1ee3c s\u1ed1 trang l\u00e0: x = 13 \uf0b47 136 : 4 = 34 (trang) x = 91. S\u1ed1 trang s\u00e1ch An ch\u01b0a \u0111\u1ecdc l\u00e0: 136 \u2013 34 = 102 (trang) \u0110\u00e1p s\u1ed1: x = 91. \u0110\u00e1p s\u1ed1: 102 trang. C\u00e2u 9. a. x \uf0b4 5 \u2013 9 = 476 x \uf0b4 5 = 476 + 9 x \uf0b4 5 = 485 x = 485 : 5=97 \u0110\u00e1p s\u1ed1: x = 97. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 25 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 26 \u0110\u1ec0 S\u1ed0 18 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. C C\u00e2u 2. B C\u00e2u 3. A C\u00e2u 4. B C\u00e2u 5. D C\u00e2u 6. B II. T\u1ef1 lu\u1eadn: C\u00e2u 7. a. b. 345 \uf02b 87 :3 \uf03d 345 \uf02b 29 \uf028475 \uf02d 384\uf029\uf0b43 \uf03d 91\uf0b43 \uf03d 374 \uf03d 273 C\u00e2u 8. a. x :5 \uf03d 14 (d\u01b0 2) b. 89: x \uf03d 8 (d\u01b0 1) x \uf03d 14\uf0b45 \uf02b 2 x \uf03d 70 \uf02b 2 x \uf03d \uf02889 \uf02d1\uf029 :8 x \uf03d 72 x \uf03d 88:8 \u0110\u00e1p s\u1ed1: x = 72. x \uf03d 11 \u0110\u00e1p s\u1ed1: x = 11. C\u00e2u 9. B\u00e0i gi\u1ea3i Tu\u1ed5i con l\u00e0: 36 \u2013 30 = 6 (tu\u1ed5i) Tu\u1ed5i m\u1eb9 g\u1ea5p tu\u1ed5i con s\u1ed1 l\u1ea7n l\u00e0: 36 : 6 = 6 (l\u1ea7n) \u0110\u00e1p s\u1ed1: 6 l\u1ea7n. C\u00e2u 10. B\u00e0i gi\u1ea3i Chi\u1ec1u d\u00e0i khu \u0111\u1ea5t l\u00e0: 124 \uf0b43 = 372 (m) Chu vi khu \u0111\u1ea5t l\u00e0: (124 + 372) \uf0b42 =992 (m) \u0110\u00e1p s\u1ed1: 992m. C\u00e2u 11. H\u00ecnh c\u00f3 21 h\u00ecnh vu\u00f4ng. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 \u0110\u1ec0 S\u1ed0 19 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. C C\u00e2u 2. C C\u00e2u 3. B C\u00e2u 4. A C\u00e2u 5. D C\u00e2u 6. C II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 665 600 284 780 4 \uf02b \uf02d \uf0b43 4 195 852 38 245 387 36 910 213 20 20 0 C\u00e2u 8. x :7 \uf03d 123 x \uf02d 384 \uf02b 124 \uf03d 173 x \uf0b49 \uf02b 273 \uf03d 363 x \uf03d 123\uf0b47 x \uf0b49 \uf03d 363 \uf02d 273 x \uf03d 861 x \uf02d 384 \uf03d 173 \uf02d124 x \uf0b49 \uf03d 90 x \uf03d 90: 9 \u0110\u00e1p s\u1ed1: x = 861. x \uf02d 384 \uf03d 49 x \uf03d 10 x \uf03d 49 \uf02b 384 \u0110\u00e1p s\u1ed1: x = 10. x \uf03d 433 \u0110\u00e1p s\u1ed1: x = 433. C\u00e2u 9. B\u00e0i gi\u1ea3i Chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt l\u00e0: 144 : 3 = 48 (cm) Chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3 l\u00e0: (144 + 48) \uf0b42 = 384 (cm) \u0110\u00e1p s\u1ed1: 384cm. C\u00e2u 10. Ph\u00e9p chia c\u00f3 s\u1ed1 chia l\u00e0 4 n\u00ean s\u1ed1 d\u01b0 l\u1edbn nh\u1ea5t l\u00e0 3. G\u1ecdi s\u1ed1 b\u1ecb chia l\u00e0 a. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 27 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 C\u00f3: a : 4 = 7 (d\u01b0 3) a =7\uf0b44+3 a = 28 + 3 a = 31. V\u1eady s\u1ed1 b\u1ecb chia l\u00e0 31. H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 28 Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 29 \u0110\u1ec0 S\u1ed0 20 I. Tr\u1eafc nghi\u1ec7m: C\u00e2u 1. B C\u00e2u 2. C C\u00e2u 3. C C\u00e2u 4. B C\u00e2u 5. D C\u00e2u 6. A II. T\u1ef1 lu\u1eadn: C\u00e2u 7. 345 274 167 184 3 \uf02b \uf02d \uf0b43 18 61 501 219 198 04 564 76 3 1 C\u00e2u 8. c. 14km : 2 + 148km = 155km a. 56dm : 8 = 7dm b. 9kg \uf0b47 : 3 = 21kg d. 500kg : 2 \u2013 150kg = 100kg. C\u00e2u 9. b. 240 : x \uf02b 1 \uf03d 81: 9 a. x :112 \uf03d 8 240: x \uf02b 1 \uf03d 9 240: x \uf03d 9 \uf02d 1 x \uf03d 8\uf0b4112 240: x \uf03d 8 x \uf03d 896 x \uf03d 240: 8 \u0110\u00e1p s\u1ed1: x = 896. x \uf03d 30 C\u00e2u 10. \u0110\u00e1p s\u1ed1: x = 30. B\u00e0i gi\u1ea3i S\u1ed1 ki-l\u00f4-gam g\u1ea1o c\u00f2n l\u1ea1i sau khi b\u00e1n l\u00e0: 165 \u2013 45 = 120 (kg) M\u1ed7i t\u00fai c\u00f3 s\u1ed1 ki-l\u00f4-gam g\u1ea1o l\u00e0: H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu Hotline: 091.269.8216","sachhoc.com To\u00e1n l\u1edbp 3 120 : 8 = 15 (kg) 6 h\u00ecnh tam gi\u00e1c; 2 h\u00ecnh t\u1ee9 gi\u00e1c. \u0110\u00e1p s\u1ed1: 15kg. C\u00e2u 11. H\u00ecnh v\u1ebd c\u00f3: H\u1ecdc to\u00e1n online c\u00f9ng th\u1ea7y Tr\u1ea7n H\u1eefu Hi\u1ebfu 30 Hotline: 091.269.8216"]
Search
