201-bai-toan-vui-luyen-tri-thong-minh-sa-thi-hong-hanh

["C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: Ta\tchia\tt\u1edd\tgi\u1ea5y\tth\u00e0nh\t40\t\u00f4\tvu\u00f4ng\tnh\u1ecf\tc\u1ea1nh\tl\u00e0\t1\tcm\t(ho\u1eb7c\t10\t\u00f4 vu\u00f4ng\tc\u1ea1nh\t2cm).\tTa\tc\u1eaft\tt\u1edd\tgi\u1ea5y\ttheo\t\u0111\u01b0\u1eddng\tkh\u00f4ng\tli\u1ec1n\tn\u00e9t,\tta\t\u0111\u01b0\u1ee3c b\u1ed1n\tm\u1ea3nh:\t1,\t2,\t3,\t4\tv\u00e0\tgh\u00e9p\tl\u1ea1i\tnh\u01b0\th\u00ecnh\td\u01b0\u1edbi\tta\t\u0111\u01b0\u1ee3c\tm\u1ed9t\th\u00ecnh vu\u00f4ng\tm\u1edbi. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i N\u1ebfu\tg\u1ecdi\ts\u1ed1\tph\u00f2ng\t\u1edf\tt\u1ea7ng\ttr\u1ec7t\tl\u00e0\t1\tph\u1ea7n\tth\u00ec\ts\u1ed1\tph\u00f2ng\t\u1edf\tt\u1ea7ng\t4\tl\u00e0\t3 ph\u1ea7n,\tdo\t\u0111\u00f3\ts\u1ed1\tph\u00f2ng\t\u1edf\tc\u1ea3\t5\tt\u1ea7ng\t\u00edt\tnh\u1ea5t\tl\u00e0 1\t+\t1+\t1+\t1\t+\t3\t=\t7\t(ph\u1ea7n)","V\u00ec\t31\t:\t7\t=\t4\t(d\u01b0\t3) N\u00ean\ts\u1ed1\tph\u00f2ng\t\u1edf\tt\u1ea7ng\ttr\u1ec7t\tnhi\u1ec1u\tnh\u1ea5t\tch\u1ec9\tl\u00e0\t4\tph\u00f2ng.\tTa\tl\u1ea7n\tl\u01b0\u1ee3t th\u1eed: a.\tN\u1ebfu\tt\u1ea7ng\ttr\u1ec7t\tc\u00f3\t1\tph\u00f2ng\tth\u00ec\tt\u1ea7ng\t4\tc\u00f3\t3\tph\u00f2ng.\tGi\u1eefa\t1\tv\u00e0\t3\tch\u1ec9 c\u00f3\ts\u1ed1\t2\tn\u00ean\t\u0111i\u1ec1u\tn\u00e0y\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\t\u0111\u1ea7u\tb\u00e0i\t(v\u00ec\t\u1edf\tgi\u1eefa\tt\u1ea7ng\ttr\u1ec7t\tv\u00e0 t\u1ea7ng\t4\tc\u00f3\tt\u1edbi\t3\tt\u1ea7ng) b.\tN\u1ebfu\tt\u1ea7ng\ttr\u1ec7t\tc\u00f3\t2\tph\u00f2ng\tth\u00ec\tt\u1ea7ng\t4\tc\u00f3\t6\tph\u00f2ng.\tGi\u1eefa\ts\u1ed1\t2\tv\u00e0\ts\u1ed1 6\tc\u00f3\t3\ts\u1ed1\t3,\t4,\t5.\tTa\tc\u00f3\t2\t+\t3\t+\t4\t+\t5\t+\t6\t=\t20\t(ph\u00f2ng). \u0110i\u1ec1u\tn\u00e0y\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\t\u0111\u1ea7u\tb\u00e0i\tv\u00ec\tch\u01b0a\t\u0111\u1ee7\t31\tph\u00f2ng. C.\tN\u1ebfu\tt\u1ea7ng\ttr\u1ec7t\tc\u00f3\t3\tph\u00f2ng\tth\u00ec\tt\u1ea7ng\t4\tc\u00f3\t9\tph\u00f2ng.\tGi\u1eefa\ts\u1ed1\t3\tv\u00e0\ts\u1ed1 9\tc\u00f3\t5\ts\u1ed1\t4,5,6,7,8. V\u00ec:\t31\t\u2013\t(3\t+\t9)\t=\t19 N\u00ean\tta\tth\u1ea5y\tc\u00f3\thai\ttr\u01b0\u1eddng\th\u1ee3p\tl\u00e0: 4\t+\t7\t+\t8\t=\t19 v\u00e0\t5\t+\t6\t+\t8\t=\t19 V\u1eady\tta\tc\u00f3: 3\t+\t4\t+\t7\t+\t8\t+\t9\t=\t31\t 3\t+\t5\t+\t6\t+\t8\t+\t9\t=\t31 Trong\tc\u1ea3\thai\ttr\u01b0\u1eddng\th\u1ee3p\tth\u00ec\ts\u1ed1\tph\u00f2ng\t\u1edf\tt\u1ea7ng\t3\t\u0111\u1ec1u\tl\u00e0\t8,\tv\u1eady\tt\u1ea7ng 3\tc\u00f3\t8\tph\u00f2ng. C\u00c2U\t4: H\u1ecfi\tb\u00f2\tm\u1ea5y\tch\u00e2n\tc\u00f3\tngh\u0129a\tl\u00e0\th\u1ecfi\tcon\tb\u00f2\tc\u00f3\tm\u1ea5y\tch\u00e2n?\tk\u1ebft\tqu\u1ea3\tcon b\u00f2\tt\u1ea5t\tnhi\u00ean\tc\u00f3\t4\tch\u00e2n.","C\u00c2U\t5: Trong\tc\u00e2u\th\u1ecfi\t\u0111\u00e3\tc\u00f3\tc\u00e2u\ttr\u1ea3\tl\u1eddi:\tc\u00f3\t10\tcon. B\u00c0I\tS\u1ed0\t6 C\u00c2U\t1: \u0110\u00e1p\ts\u1ed1:\tl\u00e0\tc\u00e2u\td C\u00c2U\t2: \u0110\u00e1nh\ts\u1ed1\tt\u1eeb\t1\t\u0111\u1ebfn\t25\tv\u00e0o\tc\u00e1c\t\u00f4\ttrong\tb\u1ea3ng,\tta\tc\u00f3\t12\t\u00f4\tmang\ts\u1ed1\tch\u1eb5n v\u00e0\t13\t\u00f4\tmang\ts\u1ed1\tl\u1ebb\tv\u00e0\tc\u00e1c\t\u00f4\tch\u1eb5n\ts\u00e1t\tli\u1ec1n\tv\u1edbi\tc\u00e1c\t\u00f4\tmang\ts\u1ed1\tl\u1ebb.\tN\u1ebfu\tb\u1ea1n Th\u1eafng\t\u0111\u00e1nh\td\u1ea5u\tv\u00e0o\t\u00f4\tl\u1ebb\tth\u00ec\tb\u1ea1n\tLong\tph\u1ea3i\t\u0111\u00e1nh\td\u1ea5u\tv\u00e0o\t\u00f4\tch\u1eb5n,\tsau \u0111\u00f3\tb\u1ea1n\tTh\u1eafng\tl\u1ea1i\ts\u1ebd\t\u0111\u00e1nh\td\u1ea5u\tv\u00e0o\t\u00f4\tl\u1ebb...;\tho\u1eb7c\tn\u1ebfu\tb\u1ea1n\tTh\u1eafng\t\u0111\u00e1nh d\u1ea5u\tv\u00e0o\t\u00f4\tch\u1eb5n\tth\u00ec\tb\u1ea1n\tLong\ts\u1ebd\t\u0111\u00e1nh\td\u1ea5u\tv\u00e0o\t\u00f4\tl\u1ebb,\tsau\t\u0111\u00f3\tb\u1ea1n\tTh\u1eafng","l\u1ea1i\t\u0111\u00e1nh\td\u1ea5u\tv\u00e0o\t\u00f4\tch\u1eb5n\u2026 Nh\u01b0\tv\u1eady\t\u0111\u1ec3\tl\u00e0\tng\u01b0\u1eddi\t\u0111i\tcu\u1ed1i\tc\u00f9ng\tth\u00ec\tTh\u1eafng\tph\u1ea3i\tch\u1ecdn\t\u00f4\tl\u1ebb,\tc\u00f3\t13 b\u01b0\u1edbc\t\u0111i,\tc\u00f2n\t\u00f4\tch\u1eb5n\tch\u1ec9\tc\u00f3\t12\tb\u01b0\u1edbc\t\u0111i.\tTh\u1eafng\tc\u00f3\tth\u1ec3\tch\u1ecdn\tb\u1ea5t\tc\u1ee9\t\u00f4\tl\u1ebb n\u00e0o\ttrong\tb\u1ea3ng\t\u0111\u1ec3\t\u0111\u00e1nh\td\u1ea5u\ttr\u01b0\u1edbc\tth\u00ec\tb\u1ea1n\t\u0111\u00f3\ts\u1ebd\tth\u1eafng. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: 9\tng\u00e0y\t8\t\u0111\u00eam,\tsau\t8\tng\u00e0y\t\u1ed1c\ts\u00ean\tleo\t\u0111\u01b0\u1ee3c\t16m,\ts\u00e1ng\tng\u00e0y\tth\u1ee9\t9 leo\tth\u00eam\t4m\tn\u1eefa\tl\u00e0\t\u0111\u1ee7. C\u00c2U\t4:","B\u00e0i\tgi\u1ea3i: Qu\u00e3ng\t\u0111\u01b0\u1eddng\tAC\td\u00e0i\tl\u00e0: 150\t:\t3\t=\t50\t(km) Qu\u00e3ng\t\u0111\u01b0\u1eddng\tBC\td\u00e0i\tl\u00e0: 150\t\u2013\t50\t=\t100\t(km) Qu\u00e3ng\t\u0111\u01b0\u1eddng\txe\tch\u1ea1y\tc\u1ea3\t\u0111i\tl\u1eabn\tv\u1ec1\tl\u00e0: 150\t+\t100\t=\t250\t(km) \u0110\u00e1p\ts\u1ed1:\t250\t(km). C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: \u0110\u1ea7u\tn\u1eb7ng\tb\u1eb1ng\t\u0111u\u00f4i\tv\u00e0\tb\u1eb1ng\tn\u1eeda\tth\u00e2n. Th\u00e2n\tn\u1eb7ng\tb\u1eb1ng\t\u0111\u1ea7u,\tb\u1eb1ng\t\u0111u\u00f4i. V\u1eady\tth\u00e2n\tn\u1eb7ng\tb\u1eb1ng\thai\t\u0111u\u00f4i\tv\u00e0\tm\u1ed9t\tn\u1eeda\tth\u00e2n. Suy\tra\tm\u1ed9t\tn\u1eeda\tth\u00e2n\tn\u1eb7ng\tb\u1eb1ng\t2\t\u0111u\u00f4i. V\u1eady\tn\u1eeda\tth\u00e2n\tc\u00e1\tn\u1eb7ng\t250\tx\t2\t=\t500(g)","C\u1ea3\tth\u00e2n\tc\u00e1\tn\u1eb7ng: 500\tx\t2\t=\t1000(g)\thay\t1kg. C\u1ea3\tcon\tc\u00e1\tn\u1eb7ng 1\t+\t1\t=\t2kg \u0110\u00e1p\ts\u1ed1:\t2kg. B\u00c0I\tS\u1ed0\t7 C\u00c2U\t1: 1000mm 18\tgi\u1edd\t10\tph\u00fat 100cm 20\tgi\u1edd\t35\tph\u00fat 10dm 23\tgi\u1edd 1m 1\tgi\u1edd\t25\tph\u00fat C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: A =\t575 \u2013\t(307\t\u2013\t199) Hi\u1ec7u S\u1ed1\tb\u1ecb\ttr\u1eeb S\u1ed1\ttr\u1eeb B =\t575 \u2013\t(307\t+\t199) Hi\u1ec7u S\u1ed1\tb\u1ecb\ttr\u1eeb S\u1ed1\ttr\u1eeb Ta\tth\u1ea5y: 2\ts\u1ed1\tb\u1ecb\ttr\u1eeb\tb\u1eb1ng\tnhau\tl\u00e0\t575 So\ts\u00e1nh\t2\ts\u1ed1\ttr\u1eeb:","(307\t\u2013\t199)\t<\t(307\t+\t199)\tv\u1eady\tA\t>\tB. C\u00c2U\t3: C\u00f3\t\u00edt\tnh\u1ea5t\thai\tc\u00e1ch\tv\u1ebd\tsau: C\u00e1ch\t1: V\u1ebd\th\u00ecnh\tvu\u00f4ng\tc\u00f3\tc\u1ea1nh\t5cm,\tk\u00e9o\td\u00e0i\tm\u1ed7i\tc\u1ea1nh\tv\u1ec1\tph\u00eda\tb\u00ean\tph\u1ea3i c\u1ee7a\tc\u1ea1nh\t1cm.\tN\u1ed1i\tc\u00e1c\t\u0111i\u1ec3m\tm\u00fat\tc\u1ee7a\tc\u00e1c\tc\u1ea1nh\tv\u1eeba\tk\u00e9o\td\u00e0i\tta\t\u0111\u01b0\u1ee3c h\u00ecnh\tvu\u00f4ng\tc\u00f3\tdi\u1ec7n\tt\u00edch\t37cm2\t(c\u00e1c\tb\u1ea1n\tt\u1ef1\tch\u1ee9ng\tminh). C\u00e1ch\t2: V\u1ebd\th\u00ecnh\tvu\u00f4ng\tc\u00f3\tc\u1ea1nh\t7cm.\tTr\u00ean\tm\u1ed7i\tc\u1ea1nh\tc\u1ee7a\th\u00ecnh\tvu\u00f4ng,\tta\tl\u1ea5y 1\t\u0111i\u1ec3m\tc\u00e1ch\t\u0111\u1ec9nh\tb\u00ean\tph\u1ea3i\tc\u1ee7a\tc\u1ea1nh\t1cm.\tN\u1ed1i\tc\u00e1c\t\u0111i\u1ec3m\t\u0111\u00f3\tl\u1ea1i,\tta\t\u0111\u01b0\u1ee3c h\u00ecnh\tvu\u00f4ng\tc\u00f3\tdi\u1ec7n\tt\u00edch\t37cm2.\t(c\u00e1c\tb\u1ea1n\tt\u1ef1\tch\u1ee9ng\tminh).","C\u00c2U\t4: Kh\u00f4ng\tcon\tn\u00e0o\tth\u1eafng\th\u1ebft. 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C\u00c2U\t5: \u0110\u00e1p\ts\u1ed1: 1\tcon\tg\u00e0:\t4\t\u0111\u1ed3ng\t 1\tcon\tv\u1ecbt:\t2\t\u0111\u1ed3ng\t 1\tcon\tngan:\t5\t\u0111\u1ed3ng B\u00c0I\tS\u1ed0\t8","C\u00c2U\t1: B\u00e0i\tgi\u1ea3i: 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9 C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: Theo\tb\u00e0i\tra,\ts\u1ed1\tbi\t\u0111\u1ecf\t\u0111\u01b0\u1ee3c\tl\u1ea5y\tra\tkh\u1ecfi\th\u1ed9p\tbao\tgi\u1edd\tc\u0169ng\tl\u00e0\t2\tvi\u00ean d\u00f9\tb\u1ed1c\t\u0111\u01b0\u1ee3c\tbi\tc\u00f9ng\tm\u00e0u\thay\tkh\u00e1c\tm\u00e0u,\tc\u00f2n\ts\u1ed1\tbi\tm\u00e0u\txanh\tl\u1ea5y\tra kh\u1ecfi\th\u1ed9p\tc\u00f3\tth\u1ec3\tl\u00e0\t1\tho\u1eb7c\t2\tvi\u00ean.\tNh\u01b0\tv\u1eady,\ts\u1ed1\tbi\t\u0111\u1ecf\ts\u1ebd\t\u0111\u01b0\u1ee3c\tl\u1ea5y\tra\t4 l\u1ea7n,\tm\u1ed7i\tl\u1ea7n\t2\tvi\u00ean,\tc\u00f2n\tl\u1ea1i\t1\tvi\u00ean\tkh\u00f4ng\tbao\tgi\u1edd\t\u0111\u01b0\u1ee3c\tl\u1ea5y\tra\tk\u1ec3\tc\u1ea3\tkhi bi\txanh\t\u0111\u00e3\t\u0111\u01b0\u1ee3c\tl\u1ea5y\tra\th\u1ebft.\tN\u00ean\tkhi\th\u00e0\td\u1eebng\tb\u1ed1c\tbi\tv\u00ec\ttrong\th\u1ed9p\tch\u1ec9 c\u00f2n\tl\u1ea1i\t1\tvi\u00ean\tth\u00ec\tvi\u00ean\tbi\t\u0111\u00f3\ts\u1ebd\tl\u00e0\tm\u00e0u\t\u0111\u1ecf. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: a.\tS\u1ed1\t9\tl\u00e0\tth\u00e1ng\t9 S\u1ed1\t2004\tl\u00e0\tn\u0103m\t2004 V\u1eady\ts\u1ed1\tc\u1ea7n\t\u0111i\u1ec1n\tl\u00e0\ts\u1ed1\t5.\tB\u1ea1n\tLoan\tb\u1eaft\t\u0111\u1ea7u\t\u0111i\th\u1ecdc\tv\u00e0o\tng\u00e0y,\tm\u1ed3ng\t5 th\u00e1ng\t9\tn\u0103m\t2004. N\u0103m\tnay\tl\u00e0\tn\u0103m\t2006\tsuy\tra\tn\u0103m\tnay\tb\u1ea1n\tLoan\th\u1ecdc\tl\u1edbp\t3\tr\u1ed3i! b.\tV\u1edf:\tm\u1ed9t\tch\u1eef\tc\u00f3\t2\tcon\tch\u1eef","B\u00fat:\tm\u1ed9t\tch\u1eef\tc\u00f3\t3\tcon\tch\u1eef S\u00e1ch:\tm\u1ed9t\tch\u1eef\tc\u00f3\t4\tcon\tch\u1eef V\u1eady\td\u1ee5ng\tc\u1ee5\th\u1ecdc\tt\u1eadp\tti\u1ebfp\ttheo\tb\u1ea1n\tph\u1ea3i\tt\u00ecm\tl\u00e0\tm\u1ed9t\tch\u1eef\tc\u00f3\t5\tcon ch\u1eef. B\u1ea1n\tc\u00f3\tth\u1ec3\t\u0111i\u1ec1n\tch\u1eef\tti\u1ebfp\ttheo\tl\u00e0\tch\u1eef\tTh\u01b0\u1edbc. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i Mu\u1ed1n\tl\u00ean\tt\u1ea7ng\t3\tph\u1ea3i\t\u0111i\tqua\t2\tc\u1ea7u\tthang. S\u1ed1\tb\u1eadc\tthang\tc\u1ee7a\tm\u1ed7i\tc\u1ea7u\tthang\tl\u00e0: 52\t:\t2\t=\t26\t(b\u1eadc\tthang) Mu\u1ed1n\tl\u00ean\tt\u1ea7ng\t6\tph\u1ea3i\t\u0111i\tqua\t5\tc\u1ea7u\tthang\tn\u00ean\tph\u1ea3i\t\u0111i\tqua: 26\tx\t5\t=\t130\t(b\u1eadc\tthang) \u0110\u00e1p\ts\u1ed1:\t130\t(b\u1eadc\tthang). C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: Tr\u1ed3ng\ttheo\th\u00ecnh\tng\u00f4i\tsao. B\u00c0I\tS\u1ed0\t9 C\u00c2U\t1:","B\u1ea1n\tvi\u1ebft\ts\u1ed1\t\u201cph\u1ea7n\u201d\txu\u1ed1ng\td\u01b0\u1edbi,\tta\tth\u1ea5y\tngay\tk\u1ebft\tqu\u1ea3:\tr\u00f5\tr\u00e0ng\tl\u00e0 anh\tch\u00e0ng\td\t\u201cchen\tngang\u201d\tr\u1ed3i!. C\u00c2U\t2: B\u1ea1n\tv\u1ebd\tc\u00e1c\tm\u0169i\tt\u00ean\tl\u1ea7n\tl\u01b0\u1ee3t\ttheo\tth\u1ee9\tt\u1ef1\ta,\tb,\tc,...\tC\u0169ng\tth\u1ea5y\tngay k\u1ebft\tqu\u1ea3:\th\u00ecnh\tc\tl\u1ea1c\tlo\u00e0i. C\u00c2U\t3: G\u1ea5p\t\u0111\u00f4i\th\u00ecnh\t1,\tta\t\u0111\u01b0\u1ee3c\th\u00ecnh\t2,\tg\u1ea5p\tti\u1ebfp\th\u00ecnh\t2,\tta\t\u0111\u01b0\u1ee3c\th\u00ecnh\t3. V\u1eady\th\u00ecnh\tm\u00e0\tta\tch\u1ecdn\tl\u00e0\th\u00ecnh\tc.","C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: S\u1ed1\tcon\tm\u00e8o\tc\u00f3\ttrong\tng\u00f4i\tnh\u00e0\tl\u00e0: 7\tx\t7\t=\t49\t(nh\u00e0) S\u1ed1\tcon\tchu\u1ed9t\tb\u1ecb\tm\u00e8o\t\u0103n\tl\u00e0: 49\tx\t7\t=\t343\t(con) S\u1ed1\tb\u00f4ng\t\u0111\u1ea1i\tm\u1ea1ch\tb\u1ecb\tchu\u1ed9t\t\u0103n\tl\u00e0: 343\tx\t7\t=\t2401\t(b\u00f4ng\t) S\u1ed1\th\u1ea1t\tm\u1ea1ch\tb\u1ecb\t\u0103n\tl\u00e0: 2401\tx\t7\t=\t16807\t(b\u00f4ng) \u0110\u00e1p\ts\u1ed1: 7\tnh\u00e0,\t49\tcon\tm\u00e8o,\t343\tcon\tchu\u1ed9t,\t2401\tb\u00f4ng,\t16807\th\u1ea1t. C\u00c2U\t5: \u0110\u00e1p\ts\u1ed1:\tb\u1eb1ng\tnhau. C\u00c2U\t6: S\u1ed1\tk\u1eb9o\tc\u1ee7a\tT\u00e8o\t S\u1ed1\tk\u1eb9o\tc\u1ee7a\tT\u00ed","B\u00e0i\tgi\u1ea3i: T\u1ed5ng\ts\u1ed1\tph\u1ea7n\tb\u1eb1ng\tnhau\tl\u00e0: 1\t+\t2\t=\t3\t(ph\u1ea7n) S\u1ed1\tk\u1eb9o\tt\u00e8o\tnh\u1eadn\t\u0111\u01b0\u1ee3c\tl\u00e0: 24\t:\t3\t=\t8\t(vi\u00ean) S\u1ed1\tk\u1eb9o\tt\u00ed\tnh\u1eadn\t\u0111\u01b0\u1ee3c\tl\u00e0: 8\tx\t2\t=\t16\t(vi\u00ean) \u0110\u00e1p\ts\u1ed1:\tT\u00e8o:\t8\tvi\u00ean\tk\u1eb9o T\u00ed:\t16\tvi\u00ean\tk\u1eb9o. B\u00c0I\tS\u1ed0\t10 C\u00c2U\t1: \u0110\u00e1p\ts\u1ed1:\tL\u00e0\tcon\tng\u01b0\u1eddi Giai\t\u0111o\u1ea1n\t\u0111\u1ea7u:\tL\u00e0\tem\tb\u00e9\tn\u00ean\tch\u1ec9\tbi\u1ebft\tb\u00f2\tb\u1eb1ng\t4\tch\u00e2n.","Giai\t\u0111o\u1ea1n\t2:\tL\u1edbn\tl\u00ean\tt\u1ea5t\tnhi\u00ean\tl\u00e0\t\u0111i\tb\u1eb1ng\t2\tch\u00e2n. Giai\t\u0111oan\t3:\tgi\u00e0\tr\u1ed3i\tph\u1ea3i\tch\u1ed1ng\tth\u00eam\tg\u1eady\tn\u00ean\ttr\u1edf\tth\u00e0nh\t3\tch\u00e2n. C\u00c2U\t2: B\u00e0i\tgi\u1ea3i:\tTa\tc\u00f3: n\t+\t1\tchia\th\u1ebft\tcho\t2,\t3,\t4,\t5,\t6,\t7,\t8,\t9 =>\tn\t+\t1=\tbcnn\t(2,\t3,\t4,\t5,\t6,\t7,\t8,\t9)=\t9\tx\t8\tx\t7\tx\t5\t=\t2520 =>\tn\t=\t2519 C\u00c2U\t3: \u0110\u00e1p\ts\u1ed1:\tcon\tru\u1ed3i\tbay\t\u0111\u01b0\u1ee3c\t100km. B\u00c0I\tS\u1ed0\t11 C\u00c2U\t1: \u00d4\tn\u00e0o\tc\u0169ng\tc\u00f3\t2\th\u00ecnh\tgi\u1ed1ng\tnhau\tnh\u01b0ng\tm\u1ed9t\th\u00ecnh\tm\u00e0u\ttr\u1eafng\tv\u00e0 m\u1ed9t\th\u00ecnh\tm\u00e0u\t\u0111\u1eadm\tn\u00ean\th\u00ecnh\t4\t\u0111i\u1ec1n\tv\u00e0o\t\u00f4\ttr\u1ed1ng\tl\u00e0\th\u1ee3p\tl\u00f4gic.","C\u00c2U\t2: L\u1ea7n\tc\u00e2n\tth\u1ee9\tnh\u1ea5t:\t\u0111\u1eb7t\tm\u1ed7i\tb\u00ean\t\u0111\u0129a\tc\u00e2n\t4\th\u00f2n\tbi. N\u1ebfu\tc\u00e2n\tkh\u00f4ng\tth\u0103ng\tb\u1eb1ng: -\tG\u1ecdi\t4\th\u00f2n\tbi\tb\u00ean\tn\u1eb7ng\tl\u00e0\t1,\t2,\t3,\t4. 4\th\u00f2n\tbi\tb\u00ean\tnh\u1eb9\tl\u00e0\t5,\t6,\t7,\t8. -\t5\th\u00f2n\tbi\t\u1edf\tngo\u00e0i\ts\u1ebd\tl\u00e0\tnh\u1eefng\th\u00f2n\tbi\tchu\u1ea9n,\tg\u1ecdi\tl\u00e0\t9,\t10,\t11,\t12,\t13 -\t\u0110em\tc\u00e2n\tl\u1ea7n\t2:\tL\u1ea5y\tc\u00e1c\th\u00f2n\tbi\t1,\t2,\t3,\t5,\t6\tc\u00e2n\tv\u1edbi\tc\u00e1c\th\u00f2n\tbi\t4,\t9, 10,\t11,\t12 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi: 1+\t2+\t3+\t5\t+\t6\t<\t4+\t9\t+\t10\t+\t11\t+\t12","=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\t1\ttrong\ts\u1ed1\t3\th\u00f2n\tbi\tsau:\th\u00f2n\tbi\t4\t(n\u1eb7ng\th\u01a1n), h\u00f2n\tbi\t5\t(nh\u1eb9\th\u01a1n),\th\u00f2n\tbi\t6\t(nh\u1eb9\th\u01a1n). H\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tkh\u00f4ng\tth\u1ec3\tn\u1eb1m\ttrong\tc\u00e1c\th\u00f2n\tbi\t1,\t2,\t3\tv\u00ec\t\u1edf\tl\u1ea7n\tc\u00e2n 1\tch\u00fang\tn\u1eb1m\t\u1edf\tb\u00ean\tn\u1eb7ng,\tl\u1ea7n\tc\u00e2n\t2\tn\u1eb1m\t\u1edf\tb\u00ean\tnh\u1eb9. C\u00e2n\t2\th\u00f2n\tbi\t5\tv\u00e0\t6 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tl\u00e0: -\t5\t=\t6\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t4 -\t5\t<\t6\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t5 -\t5\t>\t6\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t6 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi 1+\t2\t+\t3+\t5\t+\t6\t=\t4\t+\t9\t+\t10\t+\t11\t+\t12\t(c\u00e2n\tth\u0103ng\tb\u1eb1ng) =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\tnh\u1eb9\th\u01a1n\tv\u00e0\tl\u00e0\t1\ttrong\ts\u1ed1\t2\th\u00f2n\tbi\tsau: h\u00f2n\tbi\t7\tv\u00e0\t8. \u0110em\tc\u00e2n\t2\th\u00f2n\tbi\t7\tv\u00e0\t8,\th\u00f2n\tbi\tn\u00e0o\tnh\u1eb9\th\u01a1n\tl\u00e0\th\u00f2n\tbi\tc\u1ea7n\tt\u00ecm. +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi: 1+\t2+\t3+\t5\t+\t6\t>\t4\t+\t9\t+\t10\t+\t11\t+\t12 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\tn\u1eb7ng\th\u01a1n\ttrong\ts\u1ed1\t3\th\u00f2n\tbi\tsau:\th\u00f2n bi\t1,\t2,\tv\u00e0\t3 H\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tkh\u00f4ng\tth\u1ec3\tl\u00e0\tc\u00e1c\th\u00f2n\tbi\t4,\t5\tv\u00e0\t6\tv\u00ec\ttrong\t2\tl\u1ea7n\tc\u00e2n tr\u00ean,\tm\u1ed9t\tl\u1ea7n\tch\u00fang\t\u1edf\tb\u00ean\tn\u1eb7ng,\tm\u1ed9t\tl\u1ea7n\t\u1edf\tb\u00ean\tnh\u1eb9. -\tC\u00e2n\t2\th\u00f2n\tbi\t1\tv\u00e0\t2 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tl\u00e0: -\t1\t>\t2\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t1","-\t1\t<\t2\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t2 -\t1\t=\t2\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t3 N\u1ebfu\tc\u00e2n\tth\u0103ng\tb\u1eb1ng\tth\u00ec\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi: 1+\t2\t+\t3+\t4\t=\t5\t+\t6\t+\t7\t+\t8 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tn\u1eb1m\ttrong\ts\u1ed1\t5\th\u00f2n\tbi\t9,\t10,\t11,\t12,\t13 -\t\u0110em\tc\u00e2n\tl\u1ea7n\t2:\tL\u1ea5y\tc\u00e1c\th\u00f2n\tbi\t1,\t2,\t3\tc\u00e2n\tv\u1edbi\tc\u00e1c\th\u00f2n\tbi\t9,\t10,\t11 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u00e1c\th\u00f2n\tbi: 1+\t2\t+\t3\t=\t9\t+\t10\t+\t11\t(c\u00e2n\tth\u0103ng\tb\u1eb1ng) =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t12\tho\u1eb7c\t13 -\tC\u00e2n\t2\th\u00f2n\tbi\t11\tv\u00e0\t12 +\tC\u00e2n\tkh\u00f4ng\tth\u0103ng\tb\u1eb1ng\tth\u00ec\tkh\u1ed1i\tl\u01b0\u1ee3ng\t2\th\u00f2n\tbi:\t1\t\u2260\t12 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t12. +\tC\u00e2n\tth\u0103ng\tb\u1eb1ng\tth\u00ec\tkh\u1ed1i\tl\u01b0\u1ee3ng\t2\th\u00f2n\tbi:\t1\t=\t12 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t13. +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi -\t1\t+\t2\t+\t3\t>\t9\t+\t10\t+\t11 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\tnh\u1eb9\th\u01a1n\tn\u1eb1m\ttrong\ts\u1ed1\tc\u00e1c\th\u00f2n\tbi\t9, 10\tv\u00e0\t11. -\tC\u00e2n\t2\th\u00f2n\tbi\t9\tv\u00e0\t10 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tl\u00e0: -\t9\t<\t10\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t9","-\t9\t>\t10\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t10 -\t9\t=\t10\t=>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tl\u00e0\th\u00f2n\tbi\t11 +\tN\u1ebfu\tkh\u1ed1i\tl\u01b0\u1ee3ng\tc\u1ee7a\tc\u00e1c\th\u00f2n\tbi: 1\t+\t2\t+\t3\t<\t9\t+\t10\t+\t11 =>\tH\u00f2n\tbi\tc\u1ea7n\tt\u00ecm\tn\u1eb1m\ttrong\ts\u1ed1\tc\u00e1c\th\u00f2n\tbi\t9,\t10,\t11 C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: T\u1ed5ng\ts\u1ed1\tb\u1ea1n\t\u0111\u01b0\u1ee3c\tth\u01b0\u1edfng\tl\u00e0: 12\t+\t8\t=\t20\t(b\u1ea1n) S\u1ed1\tv\u1edf\tm\u1ed7i\tb\u1ea1n\t\u0111\u01b0\u1ee3c\tth\u01b0\u1edfng\tl\u00e0: 100\t:\t2\t=\t5\t(quy\u1ec3n) \u0110\u00e1p\ts\u1ed1:\t5\tquy\u1ec3n\tv\u1edf. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: N\u1ebfu\tng\u00e0y\t\u0111\u00f3\tl\u00e0: Ch\u1ee7\tnh\u1eadt:\tDavid\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\td\u1ed1i)\t=>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. Th\u1ee9\t2:\tDavid\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\td\u1ed1i)\t=>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft.","Th\u1ee9\t3:\tAndy\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\tth\u1eadt)\t=>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. Th\u1ee9\t4:\tDavid\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\tth\u1eadt)\t=>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. Th\u1ee9\t5:\tAndy\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\td\u1ed1i.\tTh\u1eadt\ts\u1ef1,\th\u00f4m\tth\u1ee9\t4,\tAndy\tn\u00f3i\td\u1ed1i) =>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. Th\u1ee9\t6:\tDavid\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\tth\u1eadt\\\" (N\u00f3i\tth\u1eadt)\t=>\tkh\u00f4ng\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. Th\u1ee9\t7:\tAndy\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\td\u1ed1i\\\"\t(n\u00f3i\tth\u1eadt) =>\t\u0111\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. V\u00e0\tDavid\ts\u1ebd\tn\u00f3i\t\\\"H\u00f4m\tqua\tt\u00f4i\tn\u00f3i\td\u1ed1i\\\"\t(n\u00f3i\td\u1ed1i) =>\t\u0110\u00fang\tv\u1edbi\tgi\u1ea3\tthi\u1ebft. V\u1eady\t\u0111\u00f3\tl\u00e0\tng\u00e0y\tth\u1ee9\t7. B\u00c0I\tS\u1ed0\t12 C\u00c2U\t1: B\u1ecf\t2\tc\u1ea1nh\tb\u00ean\tc\u1ee7a\ttam\tgi\u00e1c\t\u1edf\tgi\u1eefa,\tta\t\u0111\u01b0\u1ee3c:\ttam\tgi\u00e1c\t-\ttam\tgi\u00e1c\t= 0 =>\t\/\t\/_\t=\t0","C\u00c2U\t2: Khu\tchung\tc\u01b0\tc\u00f3\t8\tt\u1ea7ng\tm\u1ed7i\tt\u1ea7ng\tc\u00f3\t8\tph\u00f2ng\tt\u1ed5ng\tc\u1ed9ng\tl\u00e0\tc\u00f3\t64 ph\u00f2ng\tt\u1ea5t\tc\u1ea3. Tr\u01b0\u1edbc\tti\u00ean\tt\u00f4i\th\u1ecfi\t\\\"s\u1ed1\tnh\u00e0\tc\u1ee7a\tb\u1ea1n\tl\u1edbn\th\u01a1n\t32\tph\u1ea3i\tkh\u00f4ng\\\".\tgi\u1ea3\ts\u1eed Lan\ts\u1ebd\ttr\u1ea3\tl\u1eddi\tl\u00e0\t\\\"kh\u00f4ng\\\"\tth\u00ec\tt\u1ee9c\tl\u00e0\ts\u1ed1\tnh\u00e0\tLan\tph\u1ea3i\tnh\u1ecf\th\u01a1n\t32.\tTa ti\u1ebfp\tt\u1ee5c\th\u1ecfi\t\\\"s\u1ed1\tnh\u00e0\tc\u1ee7a\tb\u1ea1n\tl\u1edbn\th\u01a1n\t16\tph\u1ea3i\tkh\u00f4ng\\\".\tN\u1ebfu\tLan\ttr\u1ea3\tl\u1eddi \\\"kh\u00f4ng\\\"\tth\u00ec\tta\tl\u1ea1i\tti\u1ebfp\tt\u1ee5c\th\u1ecfi\t\\\"s\u1ed1\tnh\u00e0\tc\u1ee7a\tb\u1ea1n\tnh\u1ecf\th\u01a1n\t8\tph\u1ea3i kh\u00f4ng\\\"...\tV\u00e0\tc\u1ee9\tth\u1ebf\tta\ts\u1ebd\tt\u00ecm\tra\t\u0111\u01b0\u1ee3c\ts\u1ed1\tnh\u00e0\tc\u1ee7a\tLan\tsau\t6\tl\u1ea7n\th\u1ecfi b\u1eb1ng\tc\u00e1ch\tchia\t\u0111\u00f4i. C\u00c2U\t3: M\u1ed9t\tc\u00e1i\tth\u00ec\tc\u00f3\t7\tm\u00e0u,\tba\tc\u00e1i\tc\u0169ng\t7\tm\u00e0u\tth\u00f4i. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: Tu\u1ed5i\tth\u1eafm\tl\u00e0: 15\t\u2013\t5\t=\t10\t(tu\u1ed5i) Tu\u1ed5i\tC\u00f4\tl\u00e0: 10\tx\t3\t=\t30\t(tu\u1ed5i) \u0110\u00e1p\ts\u1ed1:\t30\ttu\u1ed5i. B\u00c0I\tS\u1ed0\t13 C\u00c2U\t1:","H\u00ecnh\tC\tkh\u00e1c\tc\u00e1c\th\u00ecnh\tc\u00f2n\tl\u1ea1i\tv\u00ec\tc\u00e1c\th\u00ecnh\tkh\u00e1c\tv\u1ebd\tb\u1eb1ng\tm\u1ed9t\tn\u00e9t, ri\u00eang\th\u00ecnh\tC\tv\u1ebd\tb\u1eb1ng\t2\tn\u00e9t. C\u00c2U\t2: H\u00ecnh\tD\tkh\u00e1c\tc\u00e1c\th\u00ecnh\tc\u00f2n\tl\u1ea1i\tv\u00ec\th\u00ecnh\tD\tv\u1ebd\tb\u1eb1ng\t2\tn\u00e9t. C\u00c2U\t3: N\u1ebfu\tba\tanh\tem\tbi\u1ebft\tng\u01b0\u1eddi\tn\u00e0o\tn\u00ean\tn\u00f3i\ttr\u01b0\u1edbc\tth\u00ec\tc\u1ea3\tba\ts\u1ebd\tnh\u1ea5t \u0111\u1ecbnh\t\u0111\u01b0\u1ee3c\tb\u00e0\tth\u01b0\u1edfng\tk\u1eb9o.\tNg\u01b0\u1eddi\tanh\tc\u1ea3\t\u0111\u1ee9ng\tsau\tc\u00f9ng\tbi\u1ebft\t2\tem \u0111\u1ee9ng\ttr\u01b0\u1edbc\tm\u00ecnh\t\u0111\u1ed9i\tm\u0169\tm\u00e0u\tg\u00ec\tn\u00ean\tbi\u1ebft\tch\u1eafc\tch\u1eafn\tm\u00e0u\tm\u0169\tc\u1ee7a m\u00ecnh\tl\u00e0\tm\u00e0u\tkh\u00e1c\tv\u1edbi\tm\u00e0u\tm\u0169\tc\u1ee7a\t2\tem.\tB\u1edfi\tv\u1eady\tng\u01b0\u1eddi\tanh\tc\u1ea3\ts\u1ebd\tn\u00f3i tr\u01b0\u1edbc\tv\u00e0\tn\u00f3i\t\u0111\u00fang\tm\u00e0u\tm\u0169\tc\u1ee7a\tm\u00ecnh.\tAnh\tth\u1ee9\t\u0111\u1ee9ng\tsau\tem\t\u00fat,\tnh\u00ecn th\u1ea5y\tm\u00e0u\tm\u0169\tc\u1ee7a\tem\t\u00fat\tv\u00e0\t\u0111\u00e3\tbi\u1ebft\tm\u00e0u\tm\u0169\tc\u1ee7a\tanh\tc\u1ea3\tn\u00ean\tc\u0169ng\tn\u00f3i \u0111\u00fang\tm\u00e0u\tm\u0169\tc\u1ee7a\tm\u00ecnh.\tC\u00f2n\tem\t\u00fat\tsau\tkhi\t\u0111\u00e3\tbi\u1ebft\tm\u00e0u\tm\u0169\tc\u1ee7a\tc\u1ea3\t2 anh\tth\u00ec\tc\u0169ng\tn\u00f3i\t\u0111\u00fang\t\u0111\u01b0\u1ee3c\tm\u00e0u\tm\u0169\tc\u1ee7a\tm\u00ecnh.\tNh\u01b0\tth\u1ebf\tc\u1ea3\tba\tanh\tem \u0111\u1ec1u\tn\u00f3i\t\u0111\u01b0\u1ee3c\t\u0111\u00fang\tm\u00e0u\tm\u0169\tc\u1ee7a\tm\u00ecnh\tv\u00e0\t\u0111\u1ec1u\t\u0111\u01b0\u1ee3c\tth\u01b0\u1edfng\tk\u1eb9o. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i M\u1ed7i\tng\u00e0y\tt\u00ed\tti\u1ebft\tki\u1ec7m\t\u0111\u01b0\u1ee3c\tl\u00e0: 3\t-\t2\t=\t1\t(ng\u00e0n\t\u0111\u1ed3ng) S\u1ed1\tng\u00e0y\t4\ttu\u1ea7n\tc\u00f3\tl\u00e0: 7\tx\t4\t=\t28\t(ng\u00e0y) Sau\t4\ttu\u1ea7n\tT\u00ed\tti\u1ebft\tki\u1ec7m\t\u0111\u01b0\u1ee3c\tl\u00e0:\t1\tx\t28\t=\t28\t(ng\u00e0n\t\u0111\u1ed3ng) \u0110\u00e1p\ts\u1ed1:\t28\tng\u00e0n\t\u0111\u1ed3ng.","B\u00c0I\tS\u1ed0\t14 C\u00c2U\t1: a. b. B\u00e0i\tgi\u1ea3i: a.\tH\u00ecnh\tkh\u00e1c\tc\u00e1c\th\u00ecnh\tc\u00f2n\tl\u1ea1i\tl\u00e0\th\u00ecnh\tB,\tv\u00ec\tc\u00e1c\th\u00ecnh\tkh\u00e1c\t\u0111\u1ec1u\tc\u00f3\t5 tam\tgi\u00e1c,\tri\u00eang\th\u00ecnh\tB\tc\u00f3\t6\ttam\tgi\u00e1c. b.\tH\u00ecnh\tD\tl\u00e0\th\u00ecnh\tkh\u00e1c\tnh\u1eefng\th\u00ecnh\tc\u00f2n\tl\u1ea1i\tv\u00ec\tc\u00e1c\th\u00ecnh\t\u0111\u1ec1u\tl\u1ea5y\t\u0111i m\u1ed9t\tph\u1ea7n\tt\u01b0,\tri\u00eang\th\u00ecnh\tD\tl\u1ea5y\t\u0111i\tm\u1ed9t\tph\u1ea7n\thai.","C\u00c2U\t2: \u0102n\tc\u1ea3\t\u0111\u1ed3ng\tc\u1ecf\tn\u1ebfu\tn\u00f3\t\u0111\u1ee7\ts\u1ee9c\tv\u00ec\td\u00e2y\tbu\u1ed9c\tv\u00e0o\tg\u1ed1c\tc\u00e2y\tch\u1ee9\tkh\u00f4ng bu\u1ed9c\tn\u00f3. C\u00c2U\t3: Hoa\tth\u1eadt\ts\u1ebd\th\u00e9o,\tn\u00ean\td\u1ec5\td\u00e0ng\tnh\u1eadn\tra\tngay. C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1: 2\tc\u00e1i,\tv\u00ec\tc\u1ee9\tt\u1edbi\t1\tgia\t\u0111\u00ecnh\th\u1ecd\tchia\tcho\tgia\t\u0111\u00ecnh\t\u0111\u00f3\t1\/2\ts\u1ed1\tb\u00e1nh. 1\/2\tc\u1ee7a\t2\tc\u00e1i\tl\u00e0\t1\tc\u00e1i\tb\u00e1nh,\tchia\txong\th\u1ecd\tl\u1ea5y\tl\u1ea1i\t1\tc\u00e1i\tb\u00e1nh.\tV\u1eady\tl\u00e0 h\u1ecd\tkh\u00f4ng\tm\u1ea5t\tc\u00e1i\tb\u00e1nh\tn\u00e0o.\tSau\tkhi\tchia\tcho\t100\tgia\t\u0111\u00ecnh\tn\u1ecd,\th\u1ecd\tv\u1eabn c\u00f2n\tnguy\u00ean\t2\tc\u00e1i\tb\u00e1nh. B\u00c0I\tS\u1ed0\t15 C\u00c2U\t1: H\u00ecnh\tB\tl\u00e0\th\u00ecnh\tl\u1ea1c\tlo\u00e0i. V\u00ec\tc\u00e1c\th\u00ecnh\tkia\t\u0111\u1ec1u\tl\u00e0\tnh\u1eefng\th\u1ed9p\tk\u00edn,\tc\u00f2n\th\u00ecnh\tb\tc\u00f3\t7\tm\u1eb7t\tb\u1ecb\tm\u1ea5t n\u1eafp\tn\u00ean\tn\u00f3\tb\u1ecb\tlo\u1ea1i. C\u00c2U\t2: C\u00f3\tnhi\u1ec1u\tc\u00e1ch\tc\u1eaft\tgh\u00e9p\tkh\u00e1c\tnhau\tnh\u01b0ng\tl\u1eddi\tgi\u1ea3i\tt\u1ed1t\tnh\u1ea5t\tl\u00e0\tc\u1eaft th\u00e0nh\tc\u00e0ng\t\u00edt\tm\u1ea3nh\tc\u00e0ng\tt\u1ed1t.\tB\u1ea1n\tc\u00f3\tth\u1ec3\tc\u1eaft\tth\u00e0nh\t4\tm\u1ea3nh\tv\u00e0\tgh\u00e9p\tl\u1ea1i th\u00e0nh\th\u00ecnh\tvu\u00f4ng\tnh\u01b0\tsau:","C\u00f3\tth\u1ec3\tc\u1eaft\tth\u00e0nh\t5\tm\u1ea3nh\tv\u00e0\tgh\u00e9p\tl\u1ea1i\tnh\u01b0\tsau: C\u00c2U\t3: \u0110\u00e1p\ts\u1ed1:\t\u0111\u00f3\tl\u00e0\t3\tem\tb\u00e9\t\u0111ang\tb\u00f2,\tch\u00fang\tta\ts\u1ebd\tth\u1ea5y\t6\td\u1ea5u\tch\u00e2n\tc\u00f2n\tl\u1ea1i l\u00e0\t6\td\u1ea5u\ttay\tn\u00ean\tkh\u00f4ng\tt\u00ednh.","C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1:\t998899\tv\u00e0\t112211 C\u00c2U\t5: S\u1ed1\tc\u00f2:\t S\u1ed1\th\u1ecdc\tsinh: B\u00e0i\tgi\u1ea3i:\tHai\ts\u1ed1\tli\u00ean\tti\u1ebfp\th\u01a1n\tk\u00e9m\tnhau\t1\t\u0111\u01a1n\tv\u1ecb. Hai\tl\u1ea7n\ts\u1ed1\tc\u00f2\tl\u00e0: 80\t\u2013\t1\t=\t81 S\u1ed1\tc\u00f2\tl\u00e0: 80\t:\t2\t=\t40\t(con) \u0110\u00e1p\ts\u1ed1:\t40\tcon\tc\u00f2. B\u00c0I\tS\u1ed0\t16 C\u00c2U\t1: H\u00ecnh\ta)\t\u0111\u01b0a\tv\u00e0o\t\u00f4\tc\u00f2n\ttr\u1ed1ng\tl\u00e0\th\u1ee3p\tl\u00ed.","C\u00c2U\t2: S\u1ed1\t7\tch\u1ed7\ttr\u1ed1ng\t\u0111\u01b0a\tv\u00e0o\tl\u00e0\th\u1ee3p\tl\u00fd. Ta\tnh\u1eadn\tth\u1ea5y: 5\tx\t7\t=\t35\t 12\tx\t7\t=\t84\t 9\tx\t7\t=\t63","C\u00c2U\t3: \t \u0110\u00e1p\t\u00e1n: C\u00f2n\t5\tg\u00f3c C\u00c2U\t4: \u0110\u00e0n\tv\u1ecbt\t|\t \u0110\u00e0n\tv\u1ecbt\t \u00bd\t\u0111\u00e0n\tv\u1ecbt\t \u00bc\t\u0111\u00e0n\tv\u1ecbt B\u00e0i\tgi\u1ea3i:","N\u1ebfu\tcoi\t1\/4\t\u0111\u00e0n\tv\u1ecbt\tl\u00e0\t1\tph\u1ea7n\tth\u00ec\t100\t\u2013\t1\t=\t99\t(con) S\u1ebd\tg\u1ed3m\tc\u00f3:\t4\t+\t4\t+\t2\t+\t1\t=\t11\t(ph\u1ea7n) M\u1ed7i\tph\u1ea7n\tg\u1ed3m\tc\u00f3: 99\t:\t11\t=\t9\t(con) C\u1ea3\t\u0111\u00e0n\tv\u1ecbt\tc\u00f3: 9\tx\t4\t=\t36\t(con) \u0110\u00e1p\ts\u1ed1:\t36\tcon\tv\u1ecbt. B\u00c0I\tS\u1ed0\t17 C\u00c2U\t1: H\u00ecnh\tb\u1ecb\tlo\u1ea1i\tl\u00e0\th\u00ecnh\tcu\u1ed1i\tc\u00f9ng.\tC\u00e1c\th\u00ecnh\tkh\u00e1c\tl\u00e0\th\u00ecnh\tkh\u1ed1i\ttrong h\u00ecnh\th\u1ecdc.\tH\u00ecnh\tcu\u1ed1i\tc\u00f9ng\tl\u00e0\tch\u1eef. C\u00c2U\t2: H\u00ecnh\tb\u1ecb\tlo\u1ea1i\tl\u00e0\th\u00ecnh\tth\u1ee9\thai.\tC\u00e1c\th\u00ecnh\tkh\u00e1c\tl\u00e0\th\u00ecnh\t\u0111a\tgi\u00e1c\tc\u00f3\tc\u00e1c","g\u00f3c,\tc\u00e1c\tc\u1ea1nh,\tri\u00eang\th\u00ecnh\tth\u1ee9\thai\tl\u00e0\th\u00ecnh\ttr\u00f2n\tn\u00f3\tkh\u00f4ng\tc\u00f3\tc\u00e1c\tg\u00f3c,\tc\u00e1c c\u1ea1nh. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: V\u00ec\tm\u1ed9t\ttu\u1ea7n\tc\u00f3\t7\tng\u00e0y\tn\u00ean\tkh\u00f4ng\tth\u1ec3\tc\u00f3\thai\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tv\u00e0\thai ng\u00e0y\tch\u1eb5n\tli\u1ec1n\tnhau.\tV\u1eady\tgi\u1eefa\thai\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tl\u00e0\tng\u00e0y\tch\u1eb5n\tph\u1ea3i\tc\u00f3 m\u1ed9t\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tl\u00e0\tng\u00e0y\tl\u1ebb. Trong\tth\u00e1ng\t\u0111\u00e3\tc\u00f3\tt\u1edbi\t3\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tl\u00e0\tng\u00e0y\tch\u1eb5n\tv\u1eady\tth\u00e1ng\t\u1ea5y ph\u1ea3i\tc\u00f3\txen\tk\u1ebd\thai\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tv\u00e0\tng\u00e0y\tl\u1ebb\tn\u1eefa.\tSuy\tra\ttrong\tth\u00e1ng n\u00e0y\tc\u00f3\t5\tng\u00e0y\tch\u1ee7\tnh\u1eadt,\tv\u00e0\tng\u00e0y\tch\u1ee7\tnh\u1eadt\t\u0111\u1ea7u\tti\u00ean\tl\u00e0\tng\u00e0y\tch\u1eb5n. V\u00ec\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tth\u1ee9\tnh\u1ea5t\t\u0111\u1ebfn\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tth\u1ee9\t5\tc\u00f3\tt\u1edbi\t7\tx\t(5\t\u2013 1)\t=\t28\tng\u00e0y,\tm\u00e0\tm\u1ed9t\tth\u00e1ng\tch\u1ec9\tc\u00f3\tt\u1ed1i\t\u0111a\tl\u00e0\t31\tng\u00e0y\tn\u00ean\tng\u00e0y\tch\u1ee7\tnh\u1eadt th\u1ee9\tnh\u1ea5t\tch\u1ec9\tc\u00f3\tth\u1ec3\tl\u00e0\tm\u00f9ng\tm\u1ed9t,\tm\u00f9ng\thai\tho\u1eb7c\tm\u00f9ng\t3. Song\t\u0111\u00f3\tl\u1ea1i\tph\u1ea3i\tl\u00e0\tng\u00e0y\tch\u1eb5n\tn\u00ean\tng\u00e0y\tch\u1ee7\tnh\u1eadt\tth\u1ee9\tnh\u1ea5t\tl\u00e0\tm\u00f9ng 2,\tsuy\tra\tng\u00e0y\tm\u1ed3ng\t9\tv\u00e0\tng\u00e0y\t16\tc\u0169ng\tl\u00e0\tng\u00e0y\tch\u1ee7\tnh\u1eadt. Do\t\u0111\u00f3\tng\u00e0y\t20\tc\u1ee7a\tth\u00e1ng\t\u1ea5y\tl\u00e0\tth\u1ee9\tn\u0103m. C\u00c2U\t4:","\u0110\u00e1p\ts\u1ed1\t:\t1\t+\t2\t+\t3\t+\t4\t+\t5\t+\t6\t+\t7\t+\t8\tx\t9\t=\t100 C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: Tr\u01b0\u1eddng\th\u1ee3p\t1: 60\t=\t10\tx\t?\tx\t? 60\t=\t10\tx\t6\tx\t1 V\u1eady\t2\tth\u1eeba\ts\u1ed1\tc\u1ea7n\tt\u00ecm\tl\u00e0\t6\tv\u00e0\t1 Tr\u01b0\u1eddng\th\u1ee3p\t2: 60\t=\t10\tx\t?\tx\t? 60=\t10\tx\t2\tx\t3 V\u1eady\t2\tth\u1eeba\ts\u1ed1\tc\u1ea7n\tt\u00ecm\tl\u00e0\t2\tv\u00e0\t3. \u0110\u00e1p\ts\u1ed1:\t6\tv\u00e0\t1\tho\u1eb7c\t2\tv\u00e0\t3. C\u00c2U\t6: L\u00fac\t\u0111\u00f3\tl\u00e0\t1\tgi\u1edd\t1\tph\u00fat\t1\tgi\u00e2y\tc\u1ee7a\tng\u00e0y\tm\u1edbi. B\u00c0I\tS\u1ed0\t18 C\u00c2U\t1: Ta\tth\u1ea5y\tc\u00e1c\th\u00ecnh\t\u1edf\tA\t\u0111\u1ed5i\tch\u1ed7\tcho\tnhau\ttheo\tng\u01b0\u1ee3c\tchi\u1ec1u\tkim\t\u0111\u1ed3ng h\u1ed3\ts\u1ebd\t\u0111\u01b0\u1ee3c\tv\u1ecb\ttr\u00ed\tnh\u01b0\t\u1edf\tb.\tT\u1eeb\th\u00ecnh\tC,\tta\tc\u0169ng\tcho\tc\u00e1c\th\u00ecnh\t\u0111\u1ed5i\tch\u1ed7\tcho","nhau\ttheo\tquy\tlu\u1eadt\t\u0111\u00f3\tth\u00ec\ts\u1ebd\t\u0111\u01b0\u1ee3c\tv\u1ecb\ttr\u00ed\tc\u00e1c\th\u00ecnh\tnh\u01b0\t\u1edf\tnh\u00f3m\t2. V\u1eady\tta\ts\u1ebd\tch\u1ecdn\tnh\u00f3m\t2\tl\u00e0\th\u1ee3p\tl\u00fd. C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: Mu\u1ed1n\t\u0111i\tt\u1eeb\tl\u00e0ng\tb\u00ean\tn\u00e0y\tsang\tl\u00e0ng\tb\u00ean\tkia\tm\u00e0\ttr\u00ean\tc\u1ea7u\tl\u1ea1i\tc\u00f3\tcon qu\u1ef7\th\u1ea5t\tl\u1ea1i\tkh\u00f4ng\tcho\tqua\tth\u00ec\tkhi\t\u0111i\t\u0111\u1ebfn\tgi\u1eefa\tc\u1ea7u\tph\u1ea3i\tquay\t\u0111\u1ea7u\tl\u1ea1i nh\u00ecn\tra\tph\u00eda\tsau\tm\u00e0\t\u0111i. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: B\u00e0i\tto\u00e1n\tn\u00e0y\tgi\u1ea3i\tb\u1eb1ng\tph\u01b0\u01a1ng\tph\u00e1p\tgi\u1ea3\tthi\u1ebft\tt\u1ea1m,\tc\u00f3\tnhi\u1ec1u\tc\u00e1ch \u0111\u1ec3\tgi\u1ea3i,\tsau\t\u0111\u00e2y\tl\u00e0\tm\u1ed9t\ttrong\tc\u00e1c\tc\u00e1ch\tgi\u1ea3i\t\u0111\u1ec3\tc\u00e1c\tb\u1ea1n\ttham\tkh\u1ea3o: S\u1ed1\tb\u00e1nh\txe\tb\u1ecb\th\u1ee5t\t\u0111i\tl\u00e0:\t56\t-\t45\t=\t11\t(b\u00e1nh). S\u1ed1\tb\u00e1nh\txe\tb\u1ecb\th\u1ee5t\t\u0111i\tl\u00e0\tdo\tta\t\u0111\u00e3\tb\u1ecf\tb\u1edbt\tm\u1ed9t\tb\u00e1nh\txe\t\u1edf\tm\u1ed7i\txe\t4 b\u00e1nh. Nh\u01b0\tv\u1eady\ts\u1ed1\txe\t4\tb\u00e1nh\tl\u00e0:\t11\t:\t1\t=\t11\t(chi\u1ebfc) S\u1ed1\txe\t3\tb\u00e1nh\tl\u00e0:\t15\t-\t11\t=\t4\t(chi\u1ebfc) S\u1ed1\t\u0111\u00e8n\tc\u1ee7a\tc\u00e1c\txe\t3\tb\u00e1nh\tl\u00e0:\t2\tx\t4\t=\t8\t(\u0111\u00e8n). S\u1ed1\t\u0111\u00e8n\tc\u1ee7a\tc\u00e1c\txe\t4\tb\u00e1nh\tl\u00e0:\t36\t-\t8\t=\t28\t(\u0111\u00e8n) Gi\u1ea3\ts\u1eed\t11\txe\t4\tb\u00e1nh\t\u0111\u1ec1u\tc\u00f3\t2\t\u0111\u00e8n\tth\u00ec\tt\u1ed5ng\ts\u1ed1\t\u0111\u00e8n\tc\u1ee7a\tch\u00fang\tl\u00e0: 2\tx\t11\t=\t22\t(\u0111\u00e8n). S\u1ed1\t\u0111\u00e8n\th\u1ee5t\t\u0111i\tl\u00e0:\t28\t-\t22\t=\t6\t(\u0111\u00e8n).","S\u1ed1\t\u0111\u00e8n\tc\u1ee7a\tc\u00e1c\txe\t4\tb\u00e1nh\tb\u1ecb\th\u1ee5t\t\u0111i\tl\u00e0\tdo\tta\t\u0111\u00e3\tb\u1ecf\tb\u1edbt\t\u1edf\tm\u1ed7i\txe\t4 b\u00e1nh\tm\u1ed9t\t\u0111\u00e8n,\tnh\u01b0\tv\u1eady\tc\u00f3\t6\txe\t3\t\u0111\u00e8n\t4\tb\u00e1nh\tb\u1ecb\tb\u1ecf\tb\u1edbt\t\u0111\u00e8n.\tS\u1ed1\txe\t2 \u0111\u00e8n\t4\tb\u00e1nh\tl\u00e0:\t11\t-\t6\t=\t5\t(xe). \u0110\u00e1p\ts\u1ed1: 4\txe\t2\t\u0111\u00e8n\t3\tb\u00e1nh 5\txe\t2\t\u0111\u00e8n\t4\tb\u00e1nh 6\txe\t3\t\u0111\u00e8n\t4\tb\u00e1nh. C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1:\t20\tchia\tcho\t1\/2\t=\t40\t+\t5\t=\t45 C\u00c2U\t5: B\u00e0i\tgi\u1ea3i:\tv\u00ec\tth\u00e1ng\tn\u00e0o\tc\u0169ng\tc\u00f3\tng\u00e0y\tth\u1ee9\t28\tn\u00ean\t\u0111\u00e1p\t\u00e1n\tl\u00e0: To\u00e0n\tb\u1ed9\t12\tth\u00e1ng\ttrong\tn\u0103m,\tth\u00e1ng\tn\u00e0o\tc\u0169ng\tc\u00f3\t28\tng\u00e0y. B\u00c0I\tS\u1ed0\t19 C\u00c2U\t1:\tCH\u1eccN\tH\u00ccNH\tD","H\u00ecnh\tb\u00ean\ttr\u00e1i\td\u1ecbch\tchuy\u1ec3n\tl\u00ean\tph\u1ea7n\ttr\u00ean\tc\u1ee7a\thai\th\u00ecnh\tb\u00ean\tc\u1ea1nh. Hai\th\u00ecnh\tb\u00ean\tc\u1ea1nh\tv\u1eabn\tn\u1eb1m\td\u01b0\u1edbi\tnh\u01b0ng\txoay\ttheo\tchi\u1ec1u\tkim\t\u0111\u1ed3ng\th\u1ed3. C\u00c2U\t2: \u0110\u00e2y\tl\u00e0\tm\u1ed9t\tb\u00e0i\tto\u00e1n\tm\u1eb9o T\u1ef1\tta\tn\u00f3i\tl\u00e1i\tth\u00e0nh\tt\u1ea1\tt\u01b0.\tSau\tkhi\tx\u00fac\t40kg\tc\u00f2n\tl\u1ea1i\t140\t-\t40\t= 100kg. C\u00c2U\t3: Ch\u1eb3ng\tkhi\tn\u00e0o\tng\u01b0\u1eddi\tng\u01b0\td\u00e2n\tr\u1eeda\ttay\t\u0111\u01b0\u1ee3c\tc\u1ea3\tv\u00ec\tn\u01b0\u1edbc\td\u00e2ng\tl\u00ean thuy\u1ec1n\tc\u0169ng\td\u00e2ng\tl\u00ean. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i:","V\u00ec\t1,\t4,\t9,\t16,...\t25 1\t=\t1\tx\t1 4\t=\t2\tx\t2 9\t=\t3\tx\t3 16\t=\t4\tx\t4 V\u1eady\ts\u1ed1\tti\u1ebfp\ttheo\tl\u00e0\t25 V\u00ec\t25\t=\t5\tx\t5 1,\t2,\t3,\t5,...\t7 7\tl\u00e0\ts\u1ed1\tnguy\u00ean\tt\u1ed1\tti\u1ebfp\ttheo 0,\t6,\t24,\t60,\u2026\t120 V\u00ec:\t0\t=\t0\tx\t1\tx\t2 6\t=\t1\tx\t2\tx\t3 24\t=\t2\tx\t3\tx\t4 60\t=\t3\tx\t4\tx\t5 120\t=\t4\tx\t5\tx\t6. B\u00c0I\tS\u1ed0\t20 C\u00c2U\t1: C\u00f3\tr\u1ea5t\tnhi\u1ec1u\tc\u00e1ch\t\u0111\u00e1nh\ts\u1ed1\tcho\tc\u00e2y.\txin\tgi\u1edbi\tthi\u1ec7u\tv\u1edbi\tc\u00e1c\tb\u1ea1n\thai c\u00e1ch\tsau:","C\u00c2U\t2: \u0110\u00e2y\tl\u00e0\tm\u1ed9t\tb\u00e0i\tto\u00e1n\tm\u1eb9o \u201c1\t\u0111\u1ed1ng\tchu\u1ed9t\tch\u00f9\u201d\tn\u00f3i\tl\u00e1i\tth\u00e0nh\t1\tch\u00fa\tchu\u1ed9t\t\u0111\u1ed3ng,\tr\u1edbt\txu\u1ed1ng\t1 con.\tV\u1eady\tkh\u00f4ng\tc\u00f2n\tcon\tn\u00e0o\th\u1ebft! C\u00c2U\t3: \u0110\u00e2y\tl\u00e0\tm\u1ed9t\tb\u00e0i\tto\u00e1n\tm\u1eb9o M\u1ed9t\t\u0111\u00e0n\tnai\th\u0103m,\tnai\th\u0103m\tn\u00f3i\tl\u00e1i\tth\u00e0nh\tn\u0103m\thai \u0110\u00e0n\tnai\t52\tcon\tb\u1ecb\t\u00f4ng\tth\u1ee3\ts\u0103n\tb\u1eafn\tch\u1ebft\t1\tcon\tc\u00f2n\t51\tcon.","C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: Chu\tvi\tkh\u1ea9u\thi\u1ec7u\tl\u00e0: (3\t+\t1)\tx\t2\t=\t8\t(m) Ta\tc\u00f3:\t50\tcm\t=\t0,5m S\u1ed1\tb\u00f3ng\t\u0111\u00e8n\tl\u00e0: 8\t:\t0,5\t=\t16\t(b\u00f3ng\t\u0111\u00e8n) S\u1ed1\tti\u1ec1n\tmua\tb\u00f3ng\t\u0111\u00e8n\tl\u00e0: 16\tx\t1800\t=\t28800\t(\u0111) \u0110\u00e1p\ts\u1ed1:\t28800\t\u0111\u1ed3ng C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: 7\tx\t0\t=\t0\t=>\t0 7\tx\t1\t=\t7\t=>\t7 7\tx\t2\t=\t14\t=>\t4 7\tx\t3\t=\t21\t=>\t1 7\tx\t4\t=\t28\t=>\t8 7\tx\t5\t=\t35\t=>\t5 V\u1eady\ts\u1ed1\tti\u1ebfp\ttheo\tl\u00e0\ts\u1ed1\t5.","B\u00c0I\tS\u1ed0\t21 C\u00c2U\t1: B\u1ea1n Tu\u1ed5i Ng\u00e0y Th\u00e1ng T\u00edn 25 10 3 D\u0169ng 27 11 4 Minh 25 11 4 Trang 25 11 3 H\u01b0\u01a1ng 27 10 3 Nh\u00ecn\tv\u00e0o\tb\u1ea3ng\tta\tth\u1ea5y:\tb\u1ea1n\tT\u00edn\tv\u00e0\tb\u1ea1n\tD\u0169ng\t\u0111o\u00e1n\tkh\u00e1c\tnhau\tho\u00e0n to\u00e0n\tn\u00ean\tn\u1ebfu\tb\u1ea1n\tn\u00e0y\t\u0111o\u00e1n\t\u0111\u00fang\tho\u00e0n\tto\u00e0n\tth\u00ec\tb\u1ea1n\tkia\t\u0111o\u00e1n\tsai\tho\u00e0n to\u00e0n\t(lo\u1ea1i).\tT\u01b0\u01a1ng\tt\u1ef1\tv\u00ec\tb\u1ea1n\tMinh\tv\u00e0\tb\u1ea1n\tH\u01b0\u01a1ng\t\u0111o\u00e1n\tkh\u00e1c\tnhau ho\u00e0n\tto\u00e0n\tn\u00ean\tn\u1ebfu\tb\u1ea1n\tn\u00e0y\t\u0111o\u00e1n\t\u0111\u00fang\tho\u00e0n\tto\u00e0n\tth\u00ec\tb\u1ea1n\tkia\t\u0111o\u00e1n\tsai ho\u00e0n\tto\u00e0n\t(lo\u1ea1i).\tDo\t\u0111\u00f3\tc\u1ea3\t4\tb\u1ea1n\tT\u00edn,\tD\u0169ng,\tMinh,\tH\u01b0\u01a1ng\t\u0111\u1ec1u\tkh\u00f4ng \u0111o\u00e1n\t\u0111\u00fang\tho\u00e0n\tto\u00e0n.\tNh\u01b0\tv\u1eady\tch\u1ec9\tc\u00f2n\tm\u1ed7i\tb\u1ea1n\ttrang\t\u0111o\u00e1n\t\u0111\u00fang\tho\u00e0n to\u00e0n.\tKhi\t\u0111\u00f3\tb\u1ea1n\tT\u00edn\t\u0111o\u00e1n\t\u0111\u00fang\ttu\u1ed5i\tv\u00e0\tth\u00e1ng,\tb\u1ea1n\tD\u0169ng\t\u0111o\u00e1n\t\u0111\u00fang ng\u00e0y,\tb\u1ea1n\tMinh\t\u0111o\u00e1n\t\u0111\u00fang\ttu\u1ed5i\tv\u00e0\tng\u00e0y,\tb\u1ea1n\tH\u01b0\u01a1ng\t\u0111o\u00e1n\t\u0111\u00fang th\u00e1ng.\t\u0110i\u1ec1u\tn\u00e0y\tph\u00f9\th\u1ee3p\tv\u1edbi\t\u0111i\u1ec1u\tki\u1ec7n\tc\u1ee7a\t\u0111\u1ec1\tb\u00e0i\tl\u00e0\t1\tb\u1ea1n\t\u0111o\u00e1n\t\u0111\u00fang ho\u00e0n\tto\u00e0n\t(b\u1ea1n\tTrang)\tv\u00e0\t4\tb\u1ea1n\tc\u00f2n\tl\u1ea1i\tkh\u00f4ng\t\u0111o\u00e1n\tsai\tho\u00e0n\tto\u00e0n. V\u1eady\tb\u1ea1n\tTrang\t\u0111\u00e3\t\u0111o\u00e1n\t\u0111\u00fang.\tC\u00f4\tgi\u00e1o\tsinh\tng\u00e0y\t11\tth\u00e1ng\t3\tv\u00e0\tc\u00f4 25\ttu\u1ed5i. C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: G\u1ecdi\ttr\u00e1i\tb\u00f3ng\tkh\u00e1c\tbi\u1ec7t\tl\u00e0\ttr\u00e1i\tgi\u1ea3. Chia\t10\ttr\u00e1i\tb\u00f3ng\tl\u00e0m\t3\tnh\u00f3m\tA,\tB\tv\u00e0\tC,\tg\u1ed3m\t3,\t3\tv\u00e0\t4\ttr\u00e1i. -\tC\u00e2n\thai\tnh\u00f3m\tA\tv\u00e0\tB\tl\u1ea7n\t1.","*\tTr\u01b0\u1eddng\th\u1ee3p\t1: -\tC\u00e2n\tl\u1ea7n\t1\tb\u1eb1ng\tnhau:\tnh\u00f3m\tA\tv\u00e0\tB\tl\u00e0\tth\u1eadt,\ttr\u00e1i\tgi\u1ea3\ttrong\tnh\u00f3m\tC. 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C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1:\t2003\tx\t2\t-\t1004\t=\t3002 B\u00c0I\tS\u1ed0\t23 C\u00c2U\t1: C\u00f3\tnhi\u1ec1u\tc\u00e1ch\td\u1eaft\tng\u1ef1a\t\u0111i\th\u1ebft\tc\u00e1c\tl\u01b0\u1ee3t\tc\u00e1c\t\u00f4\tvu\u00f4ng\tnh\u1ecf\ttrong\th\u00ecnh vu\u00f4ng,\tm\u1ed7i\t\u00f4\tch\u1ec9\t\u0111i\t\u0111\u1ebfn\tm\u1ed9t\tl\u1ea7n.\t\u0110\u00e1nh\ts\u1ed1\tth\u1ee9\tt\u1ef1\tv\u00e0o\tt\u1eebng\tv\u1ecb\ttr\u00ed\tn\u01a1i con\tm\u00e3\t\u0111\u1ee9ng,\tb\u1eaft\t\u0111\u1ea7u\tt\u1eeb\tv\u1ecb\ttr\u00ed\ts\u1ed1\t1\t\u0111\u1ebfn\tv\u1ecb\ttr\u00ed\tcu\u1ed1i\tc\u00f9ng\tl\u00e0\ts\u1ed1\t25.\tXin n\u00eau\tm\u1ed9t\tc\u00e1ch\tgi\u1ea3i\tnh\u01b0\th\u00ecnh\tv\u1ebd\tsau:","C\u00c2U\t2: \u0110\u00e1p\ts\u1ed1:\tS\u1ed1\tt\u1ef1\tnhi\u00ean\t\u0111\u00f3\tl\u00e0:\t2345 V\u00ec\tta\tnh\u1eadn\tth\u1ea5y:\tC\u00e1c\ts\u1ed1\tc\u1ee7a\ts\u1ed1\tt\u1ef1\tnhi\u00ean\t2345\tl\u00e0\tch\u1eef\ts\u1ed1\t2,\t3,\t4,\t5. Ta\tt\u00ednh\tt\u1ed5ng\tc\u1ee7a\ts\u1ed1\tt\u1ef1\tnhi\u00ean\t2345\tv\u00e0\tc\u00e1c\tch\u1eef\ts\u1ed1\tc\u1ee7a\tn\u00f3\t2345\t+\t2\t+ 3\t+\t4\t+\t5\t=\t2359 V\u1eady\tt\u1ed5ng\tc\u1ee7a\ts\u1ed1\tt\u1ef1\tnhi\u00ean\t2345\tv\u00e0\tc\u00e1c\tch\u1eef\ts\u1ed1\tc\u1ee7a\tn\u00f3\tl\u00e0\t2359 C\u00c2U\t3: M\u1ed7i\t1h\tl\u00e0\t1\tl\u1ea7n\tkim\tph\u00fat\ttr\u00f9ng\tkim\tgi\u1edd:\t1h,\t2h,\t3h,\t4h...\t\u2260\t24h. Song\tch\u1ec9\tc\u00f3\t22\tl\u1ea7n\tv\u00ec\tl\u00fac\t0h00\tv\u00e0\t24h00\tth\u00ec\ttr\u00f9ng\tv\u1edbi\tng\u00e0y\th\u00f4m tr\u01b0\u1edbc. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: B\u00f2\tkh\u00f4ng\tbi\u1ebft\t\u0111\u1ebfm\tn\u00ean\tb\u00f2\tm\u1eb9\tn\u00f3i\tsai\tr\u1ed3i!","C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: N\u1ebfu\tt\u1edd\tgi\u1ea5y\tngo\u00e0i\th\u0169\tth\u1ee9\t3\tvi\u1ebft\t\u0111\u00fang\tth\u00ec\th\u0169\t\u0111\u00f3\tch\u1ee9a\tv\u00e0ng,\tn\u00ean\tt\u1edd gi\u1ea5y\tngo\u00e0i\th\u0169\tth\u1ee9\t1\tv\u00e0\tth\u1ee9\t2\t\u0111i\u1ec1u\tsai\t=>\tm\u00e2u\tthu\u1eabn. Do\t\u0111\u00f3\tv\u00e0ng\t1\tch\u1ee9a\ttrong\th\u0169\tth\u1ee9\t1\tho\u1eb7c\tth\u1ee9\t2.\tT\u1ee9c\tl\u00e0\tv\u00e0ng\tkh\u00f4ng ch\u1ee9a\ttrong\th\u0169\tth\u1ee9\t3\t=>\tt\u1edd\tgi\u1ea5y\tngo\u00e0i\th\u0169\tth\u1ee9\t2\tvi\u1ebft\t\u0111\u00fang.\tDo\t\u0111\u00f3\th\u0169 th\u1ee9\t1\tch\u1ee9a\tv\u00e0ng\tv\u00e0\tt\u1edd\tgi\u1ea5y\tngo\u00e0i\th\u0169\tth\u1ee9\t1\tvi\u1ebft\tsai! B\u00c0I\tS\u1ed0\t24 C\u00c2U\t1: B\u00e0i\tgi\u1ea3i: C\u00f3\t7\t\u0111o\u1ea1n\tth\u1eb3ng\t1cm\t=\t7\tx\t1; C\u00f3\t6\t\u0111o\u1ea1n\tth\u1eb3ng\t2cm\t=\t6\tx\t2; T\u01b0\u01a1ng\tt\u1ef1\tnh\u01b0\tv\u1eady,\tt\u1ed5ng\t\u0111\u1ed9\td\u00e0i\tc\u00e1c\t\u0111o\u1ea1n\tth\u1eb3ng\tl\u00e0: 7\tx\t1\t+\t6\tx\t2\t+5\tx\t3\t+\t4\tx\t4\t+\t3\tx\t5\t+\t2\tx\t6\t+\t1\tx\t7\t=\t7\t+\t12\t+15\t+\t16 +\t15\t+\t12\t+\t7\t=\t84\t(cm) \u0110\u00e1p\ts\u1ed1:\t84cm C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: Tr\u01b0\u1edbc\tti\u00ean\tl\u1ea5y\tc\u1ea3\tkhuy\t\u00e1o\tv\u00e0\tchai\tn\u01b0\u1edbc\tv\u00e0o\t1\tb\u00ean,\tb\u00ean\tkia\tb\u1ecf\tch\u00e8, \u0111\u01b0\u1ee3c\t950g\tch\u00e8.","L\u1ea7n\tth\u1ee9\t2\tch\u1ec9\tb\u1ecf\t300g\tn\u01b0\u1edbc\t1\tb\u00ean,\t\u0111\u01b0\u1ee3c\t300g\tch\u00e8\tn\u1eefa,\tb\u1ecf\tri\u00eang ra. L\u1ea7n\t3\tc\u00e2n\tgi\u1ed1ng\tl\u1ea7n\t2,\tv\u1eady\tl\u00e0\t\u0111\u01b0\u1ee3c\t600g\t\u1edf\t2\tl\u1ea7n\tc\u00e2n\tsau.\tB\u1ecf\ts\u1ed1\tch\u00e8 \u0111\u00f3\tv\u00e0o\t1\tb\u00ean\tv\u00e0\tb\u1ecf\tc\u00e1i\tkhuy\t\u00e1o\tv\u00e0o\t1\tb\u00ean,\tch\u01b0a\tc\u00e2n\t\u0111\u1ec1u\t\u0111\u00fang\tkh\u00f4ng? V\u1eady\tth\u00ec\tb\u1ed1c\tth\u00eam\tch\u00e8\tb\u1ecf\tcho\t\u0111\u1ec1u,\tnh\u01b0ng\tnh\u1edb\tl\u00e0\tb\u1ecf\tri\u00eang\tra\tnh\u00e9\t(n\u00f3\tc\u00f3 \u0111\u00fang\tl\u00e0\t50g\tkh\u00f4ng\tnh\u1ec9?).\tSau\t\u0111\u00f3\tl\u1ea5y\ts\u1ed1\tch\u00e8\tm\u1edbi\tn\u00e0y\tb\u1ecf\tv\u00e0o\t950g\t\u1edf\tl\u1ea7n c\u00e2n\t\u0111\u1ea7u\tti\u00ean,\tv\u1eady\tl\u00e0\t\u0111\u1ee7\t1000g. C\u00c2U\t3: Ta\tc\u00f3: V\u1eady\tA\t=\t25\t;\tT\t=\t32\t;\tY\t=\t35\t;\tE\t=\t100\t;\tM\t=\t24\t;\tS\t=\t45\t;\tI\t=\t2\t;\tK\t= 64\t;\tG\t=\t27\t;\tO\t=\t20\t;\tC\t=\t7\t;\tN\t=\t18. \u0110i\u1ec1n\t\u0111\u1ee7\tc\u00e1c\tch\u1eef\tc\u00e1i\tv\u00e0o\tc\u00e1c\t\u00f4\tt\u01b0\u01a1ng\t\u1ee9ng\tv\u1edbi\tc\u00e1c\ts\u1ed1\tv\u00e0\tth\u00eam\tc\u00e1c d\u1ea5u\tc\u1ea7n\tthi\u1ebft\tta\t\u0111\u01b0\u1ee3c\tl\u1eddi\tkhuy\u00ean\tnh\u01b0\th\u00ecnh\td\u01b0\u1edbi:","C\u00c2U\t4: \u0110\u00e1p\t\u00e1n: Kh\u00f4ng\tn\u1eafng\tv\u00ec\tng\u00e0y\t10\t-\t12\tt\u1ee9c\tl\u00e0\tth\u1ee9\t7\tm\u00e0\t21h\tt\u1ee9c\tl\u00e0\t9h\tt\u1ed1i. C\u00c2U\t5: \u0110\u00e1p\t\u00e1n: Ch\u1eb3ng\tc\u00f3\tg\u00ec\tv\u00f4\tl\u00fd\tc\u1ea3\tv\u00ec\t3\tng\u01b0\u1eddi\tthu\u1ed9c\t3\tth\u1ebf\th\u1ec7:\tB\u00e0,\tm\u1eb9,\tch\u00e1u! C\u00c2U\t6: Th\u1ea5y\tn\u1eeda\tcon\ts\u00e2u\tl\u00e0\t\u0111\u00e1ng\ts\u1ee3\tnh\u1ea5t\tv\u00ec\tn\u1eeda\tcon\tkia\t\u0111ang\tn\u1eb1m\ttrong b\u1ee5ng\tb\u1ea1n. B\u00c0I\tS\u1ed0\t25 C\u00c2U\t1: Nh\u00ecn\th\u00ecnh\tv\u1ebd\tta\tth\u1ea5y:\tKhi\tch\u1ed3ng\thai\th\u00ecnh\tli\u1ec1n\tnhau\t\u1edf\td\u01b0\u1edbi\tth\u00ec","\u0111\u01b0\u1ee3c\th\u00ecnh\t\u1edf\ttr\u00ean\tn\u00ean\th\u00ecnh\tv\u1ebd\tth\u00edch\th\u1ee3p\t\u0111i\u1ec1n\tv\u00e0o\td\u1ea5u\t(?)\tl\u00e0\th\u00ecnh\tB. C\u00c2U\t2: T\u1ed5ng\tc\u00e1c\ts\u1ed1\tch\u1ea5m\ttr\u00f2n\tv\u00e0\t\u00f4\tvu\u00f4ng\ttrong\tm\u1ed7i\th\u00ecnh\t\u0111\u1ec1u\tb\u1eb1ng\t6. Ri\u00eang\th\u00ecnh\tB\tc\u00f3\tt\u1ed5ng\tc\u00e1c\tch\u1ea5m\ttr\u00f2n\tv\u00e0\t\u00f4\tvu\u00f4ng\tl\u00e0\t5.\tV\u1eady\th\u00ecnh\tkh\u00e1c nh\u1ea5t\ttrong\tc\u00e1c\th\u00ecnh\t\u0111\u00f3\tl\u00e0\th\u00ecnh\tB. C\u00c2U\t3: S\u1ed1\tc\u00e1\tb\u1ecb\tT\u00e8o\tc\u1eaft\t\u0111u\u00f4i\tl\u00e0\t:\t 24\tx\t3\/8\t=9\t(con\tc\u00e1) Ta\tv\u1ebd\ts\u01a1\t\u0111\u1ed3\tbi\u1ec3u\tth\u1ecb\tc\u00e1c\tph\u1ea7n\tnh\u01b0\th\u00ecnh\tv\u1ebd\ttr\u00ean.","V\u00ec\tc\u00f3\t5\tcon\tc\u00e1\tb\u1ecb\tc\u1eaft\t\u0111\u1ea7u\tv\u00e0\t\u0111u\u00f4i\t(ph\u1ea7n\txanh\tl\u00e1\tc\u00e2y)\tn\u00ean\ts\u1ed1\tc\u00e1\tch\u1ec9 b\u1ecb\tc\u1eaft\t\u0111u\u00f4i\t(ph\u1ea7n\txanh)\tl\u00e0: 9\t-\t5\t=\t4\t(con) G\u1ecdi\ts\u1ed1\tc\u00e1\tch\u1ec9\tb\u1ecb\tT\u00ed\tc\u1eaft\t\u0111\u1ea7u\t(ph\u1ea7n\tv\u00e0ng)\tl\u00e0\tx\tth\u00ec\ts\u1ed1\tc\u00e1\tkh\u00f4ng\tb\u1ecb\tc\u1eaft \u0111\u1ea7u\tv\u00e0\t\u0111u\u00f4i\t(ph\u1ea7n\t\u0111\u1ecf)\tl\u00e0:\t24\t-\t(9\t+\tx)\t=\t24\t-\t9\t-\tx\t=\t15\t-\tx L\u1ea7n\tl\u01b0\u1ee3t\tcho\tx\tl\u00e0\tc\u00e1c\ts\u1ed1\tt\u1ef1\tnhi\u00ean\tt\u1eeb\t0\t\u0111\u1ebfn\t15\tta\tc\u00f3\t16\tk\u1ebft\tqu\u1ea3 t\u01b0\u01a1ng\t\u1ee9ng. \u0110\u00e1p\ts\u1ed1:\t16\tcon C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: H\u00f4m\tkia,\th\u00f4m\tqua,\th\u00f4m\tnay,\tng\u00e0y\tmai,\tng\u00e0y\tkia. C\u00c2U\t5: \u0110\u00e1p\t\u00e1n:\t60.000 B\u00c0I\tS\u1ed0\t26 C\u00c2U\t1: Chia\tt\u1ea5m\tb\u00eca\tc\u1ee7a\tT\u00ed\tth\u00e0nh\t12\t\u00f4\tvu\u00f4ng\tb\u1eb1ng\tnhau,\tta\ts\u1ebd\tph\u00e1t\thi\u1ec7n c\u00f3\tr\u1ea5t\tnhi\u1ec1u\tc\u00e1ch\tc\u1eaft\tgh\u00e9p\t\u0111\u1ea5y.\tD\u01b0\u1edbi\t\u0111\u00e2y\tm\u1ed9t\ts\u1ed1\tc\u00e1ch\tc\u1eaft\tgh\u00e9p\tsau: C\u00c2U\t2:","\u0110\u00e1p\t\u00e1n\t(gi\u1ea3i\tm\u1eb9o): 6\tcon\tb\u00f2\t=\t3\tcon\tb\u00f2\tx\t3\tcon\tb\u00f2\t\u2013\t3\tcon\tb\u00f2\t=\tba\t(c\u1ee7a)\tcon\tb\u00f2\tx\tba (c\u1ee7a)\tcon\tb\u00f2\t-\tba\t(c\u1ee7a)\tcon\tb\u00f2 =>\tS\u1ed1\tch\u00e2n\ts\u1ebd\tl\u00e0:\t4\tx\t4\t-\t4\t=\t12\t(ch\u00e2n). C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: C\u00e1ch\t1: Ta\t\u0111\u00e1nh\ts\u1ed1\tth\u1ee9\tt\u1ef1\tcho\t10\tv\u00ed\t\u0111\u00f3\tt\u1eeb\t0\t\u0111\u1ebfn\t9,\tsau\t\u0111\u00f3\tl\u1ea5y\tt\u1eeb\ttrong\tv\u00ed\tra t\u1eebng\t\u0111\u1ed3ng\tti\u1ec1n\t\u1ee9ng\tv\u1edbi\ts\u1ed1\ttr\u00ean\tv\u00ed\t(ngh\u0129a\tl\u00e0\tv\u00ed\ts\u1ed1\t6\tth\u00ec\tl\u1ea5y\tra\t6\t\u0111\u1ed3ng, c\u00f2n\tv\u00ed\ts\u1ed1\t0\tth\u00ec\tkh\u00f4ng\tc\u1ea7n\tl\u1ea5y). Nh\u01b0\tv\u1eady\tt\u1ed5ng\tc\u1ed9ng\tta\tl\u1ea5y\t45\t\u0111\u1ed3ng\tti\u1ec1n\t(45\t=\t1\t+\t2\t+\t3\t+\t4\t+\t5\t+\t6 +\t7\t+\t8\t+\t9) \u0110em\tc\u00e2n\t45\t\u0111\u1ed3ng\tn\u00e0y\ts\u1ebd\t\u0111\u01b0\u1ee3c\tm\u1ed9t\tcon\ts\u1ed1,\tl\u1ea5y\tcon\ts\u1ed1\tn\u00e0y\ttr\u1eeb\tcho","450\t(t\u1ed5ng\ts\u1ed1\tg\tch\u00ednh\tx\u00e1c)\ts\u1ebd\tra\t1\tcon\ts\u1ed1,\ts\u1ed1\t\u0111\u00f3\tch\u00ednh\tl\u00e0\ts\u1ed1\tc\u1ee7a\tv\u00ed\tti\u1ec1n gi\u1ea3. V\u1eady\tl\u00e0\tch\u1ec9\tm\u1ed9t\tl\u1ea7n\tc\u00e2n\tta\t\u0111\u00e3\tch\u1ec9\tra\t\u0111\u01b0\u1ee3c\tv\u00ed\tti\u1ec1n\tgi\u1ea3. C\u00e1ch\t2: \u0110\u00e1nh\td\u1ea5u\tt\u1eeb\t1\u2260\t10 L\u1ea5y\tb\u1ecbch\t1\tra\t1\t\u0111\u1ed3ng,\tb\u1ecbch\t2\tl\u1ea5y\t2\t\u0111\u1ed3ng\tc\u1ee9\tth\u1ebf\tb\u1ecbch\t10\tl\u1ea5y\t10 \u0111\u1ed3ng...\tV\u00ec\t1\tv\u00ed\t10\t\u0111\u1ed3ng\t\u2260\t10\tv\u00ed\tl\u00e0\t100\t\u0111\u1ed3ng\t\u2260\t100g. Gi\u1edd\t\u0111em\tc\u00e2n\tc\u00e1c\tv\u00ed.\tN\u1ebfu\tch\u1ec9\tc\u00f3\t99g\tth\u00ec\tv\u00ed\t1\tl\u00e0\tti\u1ec1n\tgi\u1ea3\t(v\u00ec\tnh\u1eb9\th\u01a1n 1g\tdo\tthi\u1ebfu\t1\t\u0111\u1ed3ng,\tn\u1ebfu\t98g\tth\u00ec\tv\u00ed\t2\tl\u00e0\tti\u1ec1n\tgi\u1ea3\tdo\tthi\u1ebfu\t2\t\u0111\u1ed3ng,\tc\u1ee9\tth\u1ebf l\u00e0\tra). C\u00c2U\t4: \u0110\u00e1p\tS\u1ed1:\tM\u1eb9. C\u00c2U\t5: \u0110\u00e1p\ts\u1ed1\tch\u00ednh\tl\u00e0:\t(2\t+\t22\t+\t222\t+\t2222)\t:\t2=\t1234 C\u00c2U\t6: \u0110\u00e1p\t\u00e1n:\tTh\u1ee9\tt\u1ef1:\tTeo,\tT\u00e8o,\tB\u00e9,\tT\u1ebbo,\tT\u00fd B\u00c0I\tS\u1ed0\t27 C\u00c2U\t1:"]