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

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C\u00c2U\t3: V\u1eeba\tch\u01a1i\tv\u1eeba\th\u1ecdc 3\t\u00f4\th\u00e0ng\td\u1ecdc 3\t\u00f4\th\u00e0ng\tngang C\u1ed9ng\tcho\tr\u00f5\tr\u00e0ng 3\t\u00f4\t\u0111\u01b0\u1eddng\tch\u00e9o C\u1ed9ng\tsao\tcho\tkh\u00e9o K\u1ebbo\ttr\u1eadt\tk\u1ebbo\tsai Thi\tai\th\u01a1n\tai T\u1ed5ng\tra\tb\u1eb1ng\tm\u1ea5y","\u0110\u00e2y\tthi\tv\u1edbi\t\u1ea5y Em\tth\u00e1ch\t\u0111\u1ed1\tanh Tay\tl\u1eb9\tmi\u1ec7ng\tlanh H\u00f4\tnhanh\t\u0111\u00e1p\ts\u1ed1. 159 164 157 158 160 162 163 156 161 B\u00c0I\tS\u1ed0\t29 C\u00c2U\t1: Trong\tc\u00e1c\th\u00ecnh\tA,\tB,\tC,\tD\th\u00ecnh\tn\u00e0o\ts\u1ebd\tb\u1ecb\tlo\u1ea1i? C\u00c2U\t2: Trong\tc\u00e1c\th\u00ecnh\tA,\tB,\tC,\tD\th\u00ecnh\tn\u00e0o\ts\u1ebd\tb\u1ecb\tlo\u1ea1i?","C\u00c2U\t3: C\u00f3\t2\ttr\u1ee9ng\tg\u00e0\tv\u00e0\t4\ttr\u1ee9ng\tv\u1ecbt. N\u01b0\u1edbc\tb\u1eaft\t\u0111\u1ea7u\ts\u00f4i\tta\tm\u1edbi\tb\u1ecf\ttr\u1ee9ng\tv\u00e0o. Tr\u1ee9ng\tg\u00e0\t2\tph\u00fat\tth\u00ec\tch\u00edn. 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Tr\u00ean\tc\u00e0nh\ts\u1ed1\t1\tc\u00f3\t1\tcon\tchim\t\u0111\u1eadu,\tc\u00e0nh\ts\u1ed1\t2\tc\u00f3\t2\tcon\tchim\t\u0111\u1eadu, c\u00e0nh\tth\u1ee9\t3\tc\u00f3\t3\tcon\tchim\t\u0111\u1eadu...\tV\u00e0\tc\u1ee9\tth\u1ebf\tcho\t\u0111\u1ebfn\tc\u00e0nh\tth\u1ee9\t100\tc\u00f3 100\tcon\tchim\t\u0111\u1eadu. B\u1ea1n\tcho\tbi\u1ebft\ttr\u00ean\tc\u00e2y\tc\u00f3\tt\u1ea5t\tc\u1ea3\tbao\tnhi\u00eau\tcon\tchim? C\u00c2U\t3: C\u00f3\thai\tc\u00e2u\tsai.\t\u0110\u00f3\tl\u00e0\tc\u00e2u\tn\u00e0o\tv\u1eady? 2\t+\t2\t=\t4 (6\tx\t2,5)\t:\t2\t=\t7,5 210\t-\t34=\t176 64\t:\t8\t=8 5\tx\t7\t=\t34 Gi\u1ea3i\tth\u00edch\tv\u00ec\tsao\tsai\tnh\u00e9? C\u00c2U\t4: M\u1ed9t\tng\u00f4i\tnh\u00e0\tc\u00f3\t4\tcon\tm\u00e8o\ttr\u01b0\u1edbc\tm\u1eb7t\tm\u1ed7i\tcon\tm\u00e8o\tc\u00f3\t3\tcon\tm\u00e8o, tr\u00ean\t\u0111u\u00f4i\tm\u1ed7i\tcon\tm\u00e8o\tc\u00f3\t1\tcon\tm\u00e8o.\tH\u1ecfi\tng\u00f4i\tnh\u00e0\t\u0111\u00f3\tc\u00f3\tm\u1ea5y\tcon m\u00e8o? B\u00c0I\tS\u1ed0\t31","C\u00c2U\t1: T\u1eeb\t6\th\u00ecnh\t\u0111\u00e1nh\ts\u1ed1\td\u01b0\u1edbi,\th\u00e3y\tch\u1ecdn\t1\th\u00ecnh\tth\u00edch\th\u1ee3p\t\u0111i\u1ec1n\tv\u00e0o\tch\u1ed7 tr\u1ed1ng\ttr\u00ean.","C\u00c2U\t2:","V\u1eeba\tcam,\tv\u1eeba\tqu\u00fdt \u0110\u1ebfm\t\u0111\u1ee7\tm\u1ed9t\ttr\u0103m N\u1ebfu\t\u0111em\ts\u1ed1\tqu\u00fdt\tchia\t5\tb\u1ea1n\thi\u1ec1n M\u1ed7i\tb\u1ea1n\t\u0111\u01b0\u1ee3c\tch\u1ee5c\tqu\u1ea3\tnguy\u00ean S\u1ed1\tcam\tai\tbi\u1ebft\tt\u00ednh\tli\u1ec1n\tra\txem? \u0110\u1ed1\tai,\t\u0111\u1ed1\tb\u1ea1n,\t\u0111\u1ed1\tem Ai\tnhanh\t\u0111\u00e1p\ttr\u00fang\tth\u01b0\u1edfng\tk\u00e8m\tph\u00e1o\ttay. C\u00c2U\t3: C\u00f3\tng\u01b0\u1eddi\th\u1ecfi\tm\u1ed9t\tng\u01b0\u1eddi\t\u0111\u00e0n\tb\u00e0\tl\u00e0\tb\u00e0\t\u0111\u00e3\tc\u00f3\tbao\tnhi\u00eau\tcon\ttrai\tv\u00e0 con\tg\u00e1i\tv\u1eady,\tb\u00e0\tta\t\u0111\u00e1p: M\u1ed7i\t\u0111\u1ee9a\tcon\tg\u00e1i\tc\u1ee7a\tt\u00f4i\tc\u00f3\ts\u1ed1\tch\u1ecb\tem\tg\u00e1i\tb\u1eb1ng\tv\u1edbi\ts\u1ed1\tanh\tem\ttrai. V\u00e0\tm\u1ed7i\t\u0111\u1ee9a\tcon\ttrai\tc\u1ee7a\tt\u00f4i\tc\u00f3\ts\u1ed1\tch\u1ecb\tem\tg\u00e1i\tg\u1ea5p\t\u0111\u00f4i\ts\u1ed1\tanh\tem\ttrai. H\u1ecfi\tb\u00e0\tta\tc\u00f3\tbao\tnhi\u00eau\tcon\ttrai\tv\u00e0\tbao\tnhi\u00eau\tcon\tg\u00e1i? C\u00c2U\t4: H\u00e3y\t\u0111i\u1ec1n\tm\u1ed9t\ts\u1ed1\tc\u00f2n\tthi\u1ebfu\tv\u00e0\tgi\u1ea3i\tth\u00edch: 0\t|\t2\t|\t3\t|\t5\t|\t?\t|\t8\t|\t9 C\u00c2U\t5: H\u00e3y\tch\u1ec9\tra\t2\tc\u00e1ch\tc\u1eaft\th\u00ecnh\td\u01b0\u1edbi\t\u0111\u00e2y\tth\u00e0nh\t3\tmi\u1ebfng\t\u0111\u1ec3\tc\u00f3\tth\u1ec3\tgh\u00e9p l\u1ea1i\tth\u00e0nh\tm\u1ed9t\th\u00ecnh\tvu\u00f4ng...\t(kh\u00f4ng\tb\u1ecf\t\u0111i\t\u00f4\tn\u00e0o).","B\u00c0I\tS\u1ed0\t32 C\u00c2U\t1: T\u1eeb\t6\th\u00ecnh\tv\u1ebd\t\u0111\u01b0\u1ee3c\t\u0111\u00e1nh\ts\u1ed1\tph\u00eda\td\u01b0\u1edbi,\th\u00e3y\tch\u1ecdn\tm\u1ed9t\th\u00ecnh\tth\u00edch h\u1ee3p\t\u0111i\u1ec1n\tv\u00e0o\td\u1ea5u\tch\u1ea5m\th\u1ecfi.","","C\u00c2U\t2: T\u1ed5ng\ts\u1ed1\tvi\u00ean\tk\u1eb9o\t80 B\u1eddm,\tBi,\tBo\t\u0111\u00f3\t3\tng\u01b0\u1eddi\t\u0111\u01b0\u1ee3c\tph\u00e2n Bo\tso\tbi\tg\u1ea5p\t\u0111\u00f4i\tl\u1ea7n Th\u00eam\t5\tvi\u00ean,\tB\u1eddm\tl\u00e3nh\tph\u1ea7n\th\u01a1n\tBo \u0110\u1ed1\th\u1ecdc\tsinh,\t\u0111\u1ed1\th\u1ecdc\ttr\u00f2? 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C\u00c2U\t4: A\tB\tC F\tE\tD C\u00f3\t5\ttr\u00e1i\tb\u00f3ng\tn\u1eb1m\t\u1edf\tc\u00e1c\tv\u1ecb\ttr\u00ed:\tA,\tC,\tD,\tE,\tF\tnh\u01b0\ts\u01a1\t\u0111\u1ed3\ttr\u00ean\t(ri\u00eang v\u1ecb\ttr\u00ed\tB\tkh\u00f4ng\tc\u00f3\ttr\u00e1i\tb\u00f3ng\tn\u00e0o).\tB\u1ea1n\th\u00e3y\t\u0111\u1ed5i\tch\u1ed7\tcho\tt\u1ea5t\tc\u1ea3\tc\u00e1c\ttr\u00e1i","b\u00f3ng\ttr\u00ean.\tBi\u1ebft\t2\ttr\u00e1i\tb\u00f3ng\tkh\u00f4ng\tth\u1ec3\tn\u1eb1m\ttrong\tc\u00f9ng\t1\tv\u1ecb\ttr\u00ed. (g\u1ecdi\ttr\u00e1i\tb\u00f3ng\tn\u1eb1m\t\u1edf\tv\u1ecb\ttr\u00ed\tA\tl\u00e0\tb\u00f3ng\t1,\tv\u1ecb\ttr\u00ed\tB\tl\u00e0\tb\u00f3ng\t2...). 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Kh\u1ed1i\tm\u1ed9t\ts\u0129\ts\u1ed1\t\u0111\u1ee9ng\th\u00e0ng\tnh\u1ea5t\tnha Chi\u1ebfm\t1\tph\u1ea7n\t4\ttr\u01b0\u1eddng\tta Kh\u1ed1i\tn\u0103m,\tkh\u1ed1i\tb\u1ed1n,\tkh\u1ed1i\tba\tc\u00e2n\tb\u1eb1ng Kh\u1ed1i\thai\ts\u0129\ts\u1ed1\tbi\u1ebft\tr\u1eb1ng 180\tnh\u1edb\tch\u0103ng\tb\u1ea1n\thi\u1ec1n \u0110\u1ed1\tnhi\t\u0111\u1ed3ng,\t\u0111\u1ed1\tthi\u1ebfu\tni\u00ean Kh\u1ed1i\tba\ts\u0129\ts\u1ed1\t\u0111\u00e1p\tli\u1ec1n\tbao\tnhi\u00eau? C\u00c2U\t6: Cho\tm\u1ea3nh\tgi\u1ea5y\tnh\u01b0\th\u00ecnh\tv\u1ebd\td\u01b0\u1edbi\t\u0111\u00e2y:","H\u00e3y\tc\u1eaft\tm\u1ea3nh\tgi\u1ea5y\tth\u00e0nh\t4\tm\u1ea3nh\tnh\u1ecf\tb\u1eb1ng\tnhau. B\u00c0I\tS\u1ed0\t37 C\u00c2U\t1: H\u00ecnh\tn\u00e0o\tkh\u00e1c\tlo\u1ea1i?","C\u00c2U\t2: M\u1ed9t\t\u00f4ng\tch\u1ee7\tn\u00f4ng\ttr\u1ea1i\tn\u1ecd\tc\u00f3\tr\u1ea5t\tnhi\u1ec1u\tc\u1eebu.\tBi\u1ebft\tr\u1eb1ng\tn\u1ebfu\t\u00f4ng\tta b\u00e1n\t\u0111i\tm\u1ed9t\tn\u1eeda\ts\u1ed1\tc\u1eebu\tc\u1ee7a\tm\u00ecnh\tc\u1ed9ng\tn\u1eeda\tcon\tc\u1eebu.\tSau\t\u0111\u00f3\tl\u1ea1i\tb\u00e1n ti\u1ebfp\tm\u1ed9t\tn\u1eeda\ts\u1ed1\tc\u1eebu\tc\u00f2n\tl\u1ea1i\tc\u1ed9ng\tn\u1eeda\tcon\tc\u1eebu.\t\u00f4ng\tta\tc\u1ee9\tb\u00e1n\t\u0111\u1ebfn\tl\u1ea7n th\u1ee9\ts\u00e1u\tth\u00ec\tch\u1ec9\tc\u00f2n\tm\u1ed9t\tcon\tduy\tnh\u1ea5t\tm\u00e0\tth\u00f4i.\tB\u1ea1n\tc\u00f3\tbi\u1ebft\t\u00f4ng\tta\tc\u00f3 bao\tnhi\u00eau\tcon\tkh\u00f4ng?\tb\u1ea1n\th\u00e3y\tgi\u1ea3i\tth\u00edch\tnh\u00e9!","C\u00c2U\t3: 4\tanh\tch\u1ecb\tem\tquy\u1ebft\t\u0111\u1ecbnh\tb\u0103ng\tqua\tm\u1ed9t\tcon\ts\u00f4ng\t\u00edt\tn\u01b0\u1edbc\tv\u00e0o\tban \u0111\u00eam\tn\u00ean\tc\u1ea7n\tm\u1ed9t\t\u0111\u00e8n\tpin. -\tAnh\tA\tqua\ts\u00f4ng\tch\u1ec9\tc\u00f3\t1\tph\u00fat. -\tAnh\tB\tqua\ts\u00f4ng\tch\u1ec9\tc\u1ea7n\t2\tph\u00fat. -\tAnh\tC\tqua\ts\u00f4ng\tm\u1ea5t\t5\tph\u00fat. -\tCh\u1ecb\tD\tqua\ts\u00f4ng\tm\u1ea5t\t10\tph\u00fat. \u0110i\u1ec1u\tki\u1ec7n:\tM\u1ed7i\tl\u1ea7n\tqua\tth\u00ec\tph\u1ea3i\tqua\t2\tng\u01b0\u1eddi,\tai\tc\u0169ng\t\u0111\u01b0\u1ee3c,\tth\u1eddi gian\tT\u00ednh\ttheo\tng\u01b0\u1eddi\t\u0111i\tch\u1eadm,\tv\u00ed\td\u1ee5\tanh\ta\t\u0111i\tchung\tv\u1edbi\tanh\tc\tth\u00ec\tph\u1ea3i T\u00ednh\tqua\ts\u00f4ng\tm\u1ea5t\t5\tph\u00fat. V\u00ec\tch\u1ec9\tc\u00f3\t1\t\u0111\u00e8n\tpin\tn\u00ean\tkhi\t2\tng\u01b0\u1eddi\tqua\txong\tth\u00ec\tph\u1ea3i\tc\u00f3\t1\tng\u01b0\u1eddi \u0111em\t\u0111\u00e8n\tpin\tv\u1ec1\tcho\t2\tng\u01b0\u1eddi\tkh\u00e1c\t\u0111i\tqua. L\u00e0m\tth\u1ebf\tn\u00e0o\ttrong\tv\u00f2ng\t17\tph\u00fat\tc\u1ea3\t4\tng\u01b0\u1eddi\t\u0111\u1ec1u\tqua\ts\u00f4ng? C\u00c2U\t4: B\u1ea1n\t\u0111i\tv\u00e0o\t1\tc\u0103n\tnh\u00e0\tc\u1ee7a\tc\u00e1c\tch\u00fa\tl\u00f9n.\tChi\u1ec1u\tcao\tc\u1ee7a\tc\u00e1c\tch\u00fa\tnh\u01b0 sau: 115cm,\t112cm,\t1m\t07,\t1200mm,\t97cm,\t990mm. H\u1ecfi\tai\tcao\tnh\u1ea5t\ttrong\tnh\u00e0? C\u00c2U\t5: Ch\u1eafc\tb\u1ea1n\th\u1ecdc\ts\u1ed1\tLa\tm\u00e3\tr\u1ed3i\tph\u1ea3i\tkh\u00f4ng? X\t-\tlll\t=\tXll","B\u1ea1n\th\u00e3y\tdi\tchuy\u1ec3n\t1\tque\tsao\tcho\t\u0111\u00fang\tv\u1edbi\tph\u00e9p\tT\u00ednh\tnh\u00e9! C\u00c2U\t6: Cong\t\u0111u\u00f4i\tth\u00ec\tl\u1edbn\tm\u00e0\tcong\t\u0111\u1ea7u\tth\u00ec\tnh\u1ecf.\tL\u00e0\tg\u00ec? B\u00c0I\tS\u1ed0\t38 C\u00c2U\t1: H\u00ecnh\tn\u00e0o\tkh\u00e1c\tlo\u1ea1i:","C\u00c2U\t2: C\u00f3\t3\tc\u00e1i\tth\u00f9ng: -\tC\u00e1i\tth\u1ee9\t1\t\u0111\u1ef1ng\t16\tl\u00edt\tn\u01b0\u1edbc -\tC\u00e1i\tth\u1ee9\t2\tc\u00f3\tdung\tt\u00edch\t11\tl\u00edt\t(kh\u00f4ng\tch\u1ee9a\tn\u01b0\u1edbc) -\tC\u00e1i\tth\u1ee9\t3\tc\u00f3\tdung\tt\u00edch\t6\tl\u00edt\tc\u0169ng\tkh\u00f4ng\tch\u1ee9a\tn\u01b0\u1edbc","H\u1ecfi\tb\u1ea1n\tph\u1ea3i\t\u0111\u1ed5\tnh\u01b0\tth\u1ebf\tn\u00e0o\t\u0111\u1ec3\tth\u00f9ng\tth\u1ee9\t1\tv\u00e0\tth\u1ee9\t2\tc\u00f3\ts\u1ed1\tl\u00edt n\u01b0\u1edbc\tb\u1eb1ng\tnhau?\t(\u0110\u1ec1u\tb\u1eb1ng\t8\tl\u00edt) C\u00c2U\t3: B\u1ea1n\tc\u00f3\tm\u1ed9t\ts\u1ed1\ts\u1ee3i\td\u00e2y\tch\u00e1y\tch\u1eadm\td\u00f9ng\tl\u00e0m\tng\u00f2i\tph\u00e1o.\tM\u1ed7i\ts\u1ee3i d\u00e2y\tch\u00e1y\tt\u1eeb\t\u0111\u1ea7u\t\u0111\u1ebfn\tcu\u1ed1i\tm\u1ea5t\t1\tgi\u1edd\tnh\u01b0ng\tch\u00e1y\tkh\u00f4ng\t\u0111\u01b0\u1ee3c.\tN\u1eeda\ts\u1ee3i \u0111\u1ea7u\tch\u00e1y\tv\u00e8o\ttrong\t10\tph\u00fat,\tn\u1eeda\tc\u00f2n\tl\u1ea1i\tch\u00e1y\ttrong\t50\tph\u00fat.\tV\u1edbi\ts\u1ed1 d\u00e2y\tn\u00e0y,\tb\u1ea1n\tc\u00f3\tth\u1ec3\t\u0111o\t\u0111\u01b0\u1ee3c\tgi\u1edd\tkh\u00f4ng? C\u00c2U\t4: C\u00f3\t8\tt\u1ea5m\tb\u00eca\ttr\u00ean\t\u0111\u00f3\tm\u1ed7i\tt\u1ea5m\t\u0111\u01b0\u1ee3c\tghi\tc\u00e1c\tcon\ts\u1ed1\tl\u1ea7n\tl\u01b0\u1ee3t\tl\u00e0:\t1;\t2; 3;\t4;\t5;\t7;\t8;\t9.\tB\u1ea1n\th\u00e3y\tchia\t8\tt\u1ea5m\tb\u00eca\ttr\u00ean\tth\u00e0nh\thai\tnh\u00f3m\tsao\tcho t\u1ed5ng\tc\u00e1c\tch\u1eef\ts\u1ed1\tc\u1ee7a\t2\tnh\u00f3m\tb\u1eb1ng\tnhau? C\u00c2U\t5: C\u00f3\t5\t\u0111o\u1ea1n\tx\u00edch,\tm\u1ed7i\t\u0111o\u1ea1n\tc\u00f3\t3\tm\u1eaft\tx\u00edch.\tH\u1ecfi\tng\u01b0\u1eddi\tth\u1ee3\tr\u00e8n\tc\u1ea7n th\u00e1o\tra\tv\u00e0\tgh\u00e9p\t\u00edt\tnh\u1ea5t\tbao\tnhi\u00eau\t\u0111o\u1ea1n\tm\u1eaft\tx\u00edch\t\u0111\u1ec3\t\u0111\u01b0\u1ee3c\t1\t\u0111o\u1ea1n\tx\u00edch d\u00e0i\tli\u00ean\tt\u1ee5c.\tTr\u00ecnh\tb\u00e0y\tc\u1ea3\tc\u00e1ch\tc\u1eaft\tv\u00e0\tgh\u00e9p? C\u00c2U\t6: C\u00f3\t100\t\u0111\u1ed9i\tb\u00f3ng,\tph\u1ea3i\t\u0111\u1ea5u\t\u00edt\tnh\u1ea5t\tbao\tnhi\u00eau\ttr\u1eadn\t\u0111\u1ec3\tc\u00f3\t\u0111\u1ed9i\t\u0111\u1ea1t\tgi\u1ea3i qu\u00e1n\tqu\u00e2n? C\u00c2U\t7: \u0110\u1ed1\tvui\tv\u1eeba\th\u1ecdc\tv\u1eeba\tch\u01a1i L\u00e0m\ttheo\t2\tc\u00e1ch\txin\tm\u1eddi\tb\u1ea1n\tghi Thu\u1ed9c\tl\u00e0u\tquy\tt\u1eafc\tkh\u00f3\tchi","Tr\u00ecnh\tb\u00e0y\tr\u00f5\t\u0111\u1eb9p\tc\u00f9ng\tthi\t\u0111ua\tt\u00e0i Th\u1eed\txem\tai\tgi\u1ecfi\th\u01a1n\tai A\/\t(\t15\t+\t20)\t:\t5\t=\t? B\/\t(\t20\t+\t16)\t:\t4\t=\t? C\/\t(\t21\t+\t14)\t:\t7\t=\t? D\/\t(\t81\t+\t18\t)\t:\t9\t=\t? B\u00c0I\tS\u1ed0\t39 C\u00c2U\t1: S\u1ed1\tn\u00e0o\tthay\tcho\td\u1ea5u\tch\u1ea5m\th\u1ecfi ABCD 2357 --- --- --- --- 7 8 9 10 16 17 17 18 ???? C\u00c2U\t2: Ti\u1ebfp\ttheo\ttr\u00ecnh\tt\u1ef1\ts\u1ebd\tl\u00e0\th\u00ecnh\tn\u00e0o?","C\u00c2U\t3: Hai\tb\u1ea1n\tTh\u0103ng\tv\u00e0\tLong\tc\u00f9ng\tch\u01a1i\ttr\u00f2\tch\u01a1i:\ttr\u00ean\tm\u1eb7t\tb\u00e0n\tc\u00f3\t3\tc\u00e1i h\u1ed9p,\th\u1ed9p\tth\u1ee9\tnh\u1ea5t\t\u0111\u1ef1ng\t20\tvi\u00ean\tbi,\th\u1ed9p\tth\u1ee9\thai\t\u0111\u1ef1ng\t25\tvi\u00ean\tbi,\th\u1ed9p th\u1ee9\tba\t\u0111\u1ef1ng\t20\tvi\u00ean\tbi.\tM\u1ed7i\tl\u1ea7n\t\u0111\u1ebfn\tl\u01b0\u1ee3t\tm\u00ecnh,\tm\u1ed7i\tng\u01b0\u1eddi\t\u0111\u01b0\u1ee3c\tl\u1ea5y\t\u0111i s\u1ed1\tvi\u00ean\tbi\tt\u00f9y\t\u00fd\ttrong\tc\u00f9ng\tm\u1ed9t\th\u1ed9p,\tai\tl\u1ea5y\t\u0111\u01b0\u1ee3c\tvi\u00ean\tbi\tcu\u1ed1i\tc\u00f9ng\tl\u00e0 ng\u01b0\u1eddi\tth\u1eafng\tcu\u1ed9c.\tTh\u0103ng\t\u0111\u01b0\u1ee3c\tgh\u00e9p\t\u0111i\ttr\u01b0\u1edbc.\tH\u00e3y\tgi\u00fap\tth\u0103ng\tb\u00ed\tquy\u1ebft \u0111\u1ec3\tTh\u0103ng\tch\u1eafc\tch\u1eafn\tth\u1eafng\ttrong\tcu\u1ed9c\tthi\tn\u00e0y\tnh\u00e9! C\u00c2U\t4: M\u1ed9t\tng\u01b0\u1eddi\th\u1ecfi\t\u00f4ng\tl\u00e3o\t\u0111ang\tc\u00e2u\tc\u00e1\tl\u00e0\tc\u00e2u\t\u0111\u01b0\u1ee3c\tm\u1ea5y\tcon\tr\u1ed3i?\t\u00f4ng l\u00e3o\ttr\u1ea3\tl\u1eddi:\t\\\"s\u00e1u\tcon\tkh\u00f4ng\t\u0111\u1ea7u,\tch\u00edn\tcon\tkh\u00f4ng\t\u0111u\u00f4i,\tt\u00e1m\tcon\tb\u1ecb\t\u0111\u1ee9t ngang\tth\u00e2n\\\".\tH\u1ecfi\t\u00f4ng\tl\u00e3o\tc\u00e2u\t\u0111\u01b0\u1ee3c\tm\u1ea5y\tcon\tc\u00e1?","C\u00c2U\t5: a b\tc d\te\tf g\th i B\u1ea1n\th\u00e3y\tthay\tnh\u1eefng\tch\u1eef\tc\u00e1i\tt\u1eeb\ta\t\u0111\u1ebfn\ti\tb\u1eb1ng\tnh\u1eefng\tcon\ts\u1ed1\tt\u1eeb\t10 \u0111\u1ebfn\t99\tsao\tcho: -\tCh\u00fang\tl\u00e0\t9\ts\u1ed1\tli\u1ec1n\tnhau\t(v\u00ed\td\u1ee5\t10\t\u0111\u1ebfn\t18) -\tC\u00f3\t3\ts\u1ed1\ttrong\tch\u00fang\tl\u00e0\ts\u1ed1\tnguy\u00ean\tt\u1ed1\t(s\u1ed1\tnguy\u00ean\tt\u1ed1\tch\u1ec9\tchia\t\u0111\u01b0\u1ee3c cho\t1\tv\u00e0\tch\u00ednh\tn\u00f3\tnh\u01b0\t11,\t13,\t17,\t19,\t23...) -\tT\u1ed5ng\tc\u1ee7a\tt\u1ea5t\tc\u1ea3\tc\u00e1c\tcon\ts\u1ed1\tc\u1ee7a\tch\u00fang\tnh\u1ecf\th\u01a1n\t60\t(v\u00ed\td\u1ee5\tn\u1ebfu\ta \u0111\u1ebfn\ti\tl\u00e0\t10\t\u0111\u1ebfn\t18\tth\u00ec\tb\u1ea1n\tc\u1ed9ng\tnh\u01b0\tsau:\t1+\t0\t+\t1+\t1+\t1+\t2+\t1+\t3+\t1\t+ 4\t+\t1\t+\t5\t+\t1+\t6...\t>\t60). -\tT\u1ed5ng\tc\u1ee7a\tt\u1eebng\th\u00e0ng\tngang\t\u0111\u1ec1u\tl\u00e0\ts\u1ed1\tnguy\u00ean\tt\u1ed1 C\u00c2U\t6: Minh,\tH\u00e0\tv\u00e0\tTu\u1ea5n\t\u1edf\tchung\tm\u1ed9t\tc\u0103n\tnh\u00e0\ttranh.\t\u0110\u00e2y\tl\u00e0\t1\tc\u0103n\tnh\u00e0\tc\u0169 c\u00f3\tm\u1ed9t\tchi\u1ebfc\tb\u1ebfp\tn\u1ea5u.\tMinh\t\u0111\u1eb7t\t3\tkh\u00fac\tc\u1ee7i\tv\u00e0o\tb\u1ebfp,\tH\u00e0\tth\u00eam\tv\u00e0o\t5 kh\u00fac,\tc\u00f2n\tTu\u1ea5n\tkh\u00f4ng\tc\u00f3\tkh\u00fac\tc\u1ee7i\tn\u00e0o,\tb\u00e8n\ttr\u1ea3\tti\u1ec1n\tcho\tMinh,\tH\u00e0\t8 \u0111\u1ed3ng\t\u0111\u1ec3\t\u0111\u00f3ng\tg\u00f3p.\tV\u1eady\tMinh\tv\u00e0\tH\u00e0\ts\u1ebd\tchia\tnhau\ts\u1ed1\tti\u1ec1n\t\u1ea5y\tnh\u01b0\tth\u1ebf n\u00e0o? C\u00c2U\t7: C\u00f3\t1\tqu\u1ea3\td\u01b0a\th\u1ea5u\tb\u1ea1n\tl\u00e0m\tsao\tch\u1ec9\tc\u1ea7n\t3\tnh\u00e1t\tdao\t(\u0111\u01b0\u1eddng\tth\u1eb3ng)","chia\ttr\u00e1i\td\u01b0a\th\u1ea5u\tra\t8\tmi\u1ebfng? B\u00c0I\tS\u1ed0\t40 C\u00c2U\t1: S\u1ed1\tti\u1ebfp\ttheo\ttrong\td\u00e3y\ts\u1ed1\tsau\t\u0111\u00e2y\tl\u00e0\ts\u1ed1\tn\u00e0o?\tb\u1ea1n\th\u00e3y\tkhoanh\ttr\u00f2n v\u00e0o\t\u0111\u00e1p\t\u00e1n\t\u0111\u00fang\tnh\u00e9! 1\u2026\t2\u2026\t3\u2026\t5...\t8\u2026\t13\u2026\t21\u2026\t34...? A.\t40 B.\t68 C.\t55 D.\t48 C\u00c2U\t2: C\u00f3\t16\tc\u00e2y\tt\u1ea5t\tc\u1ea3,\tb\u1ea1n\th\u00e3y\ttr\u1ed3ng\t\u0111\u1ee7\ts\u1ed1\tc\u00e2y\tsao\tcho:\tc\u00f3\tt\u1ea5t\tc\u1ea3\t8\th\u00e0ng m\u00e0: -\t4\th\u00e0ng\t4\tc\u00e2y -\t4\th\u00e0ng\t5\tc\u00e2y Ch\u00fa\t\u00fd:\tkho\u1ea3ng\tc\u00e1ch\tc\u00e1c\tc\u00e2y\ttrong\th\u00e0ng\tph\u1ea3i\tc\u00e1ch\t\u0111\u1ec1u\tnhau. C\u00c2U\t3: M\u1ed9t\tcon\tg\u00e0\ttr\u1ed1ng\t\u0111\u1ebb\t10\tqu\u1ea3\ttr\u1ee9ng,\tm\u1ed7i\tb\u01b0\u1edbc\t\u0111i\t\u0111\u1ec3\tl\u1ea1i\t1\tqu\u1ea3.\t\u0110\u1ed1 b\u1ea1n,\t9\tb\u01b0\u1edbc\tcon\tg\u00e0\ttr\u1ed1ng\t\u0111\u1ec3\tl\u1ea1i\tbao\tnhi\u00eau\tqu\u1ea3? C\u00c2U\t4: 6\t+\t6\t+\t6\t+\t6\t+\t6\t+\t6\t+\t6\t+\t6\t+\t6\t+\t6=?","B\u1eb1ng\tbao\tnhi\u00eau\tai\tbi\u1ebft\tn\u00e0o?\tT\u00ednh\tth\u1eadt\tnhanh\tb\u00e9\tnh\u00e9!\tch\u1ec9\t3\tgi\u00e2y th\u00f4i! 6\tx\t10=\t? C\u00c2U\t5: Nam\t\u0111ang\tc\u1eaft\tm\u00f3ng\ttay,\t1\tph\u00fat\tc\u1eaft\t\u0111\u01b0\u1ee3c\thai\tm\u00f3ng\th\u1ecfi\ttrong\t7 ph\u00fat\tNam\tc\u1eaft\t\u0111\u01b0\u1ee3c\tbao\tnhi\u00eau\tm\u00f3ng\ttay? C\u00c2U\t6: \u0110\u1ea7u\tc\u1ee7a\tm\u1ed9t\tcon\tng\u1ef1a\tquay\tv\u1ec1\th\u01b0\u1edbng\tb\u1eafc\th\u1ecfi\t\u0111u\u00f4i\tn\u00f3\tquay\tv\u1ec1 h\u01b0\u1edbng\tn\u00e0o? C\u00c2U\t7: \u0110\u1ed1\tb\u1ea1n,\tc\u00f3\t9\tque\tdi\u00eam\tl\u00e0m\tsao\tb\u1ea1n\tx\u1ebfp\t\u0111\u01b0\u1ee3c\tth\u00e0nh\t10\th\u00e0ng\td\u1ecdc? C\u00c2U\t8: Trong\tgi\u1edd\tra\tch\u01a1i\tc\u1ee7a\tng\u00e0y\tth\u1ee9\t2,\tb\u1ed1n\tc\u00f4\tsinh\tvi\u00ean\tt\u00ean\tl\u00e0\tHoa,\tAn, B\u00ecnh,\tNh\u00e0n\tng\u1ed3i\tn\u00f3i\tchuy\u1ec7n\tquanh\tm\u1ed9t\tc\u00e1i\tb\u00e0n\ttr\u00f2n.\tC\u00f4\tm\u1eb7c\t\u00e1o\td\u00e0i xanh\tth\u00ec\tng\u1ed3i\tgi\u1eefa\tc\u00f4\tm\u1eb7c\t\u00e1o\td\u00e0i\tt\u00edm\tv\u00e0\tc\u00f4\tNh\u00e0n.\tC\u00f4\tm\u1eb7c\t\u00e1o\td\u00e0i\ttr\u1eafng th\u00ec\tng\u1ed3i\tgi\u1eefa\tc\u00f4\tm\u1eb7c\t\u00e1o\td\u00e0i\th\u1ed3ng\tv\u00e0\tc\u00f4\tB\u00ecnh. Bi\u1ebft\tr\u1eb1ng\tAn\tv\u00e0\tB\u00ecnh\tkh\u00f4ng\tm\u1eb7c\t\u00e1o\td\u00e0i\txanh.\tH\u1ecfi\tai\tm\u1eb7c\t\u00e1o\td\u00e0i m\u00e0u\tg\u00ec? C\u00c2U\t9: Tu\u1ed5i\t\u00d4ng\tg\u1ea5p\t\u0111\u00f4i\ttu\u1ed5i\tM\u1eb9 2\ttu\u1ed5i\tM\u1eb9\ttr\u1ebb\th\u01a1n\tBa","G\u1ea5p\t5\ttu\u1ed5i\tb\u00e9\tra\tl\u00e0\ttu\u1ed5i\tBa \u00d4ng\t66\ttu\u1ed5i\t\u0111\u00e2y\tnha Bao\tnhi\u00eau\ttu\u1ed5i\tB\u00e9\tg\u1ea7n\txa\tt\u00ednh\tgi\u00f9m?","PH\u1ea6N\t2:\tH\u01af\u1edaNG\tD\u1eaaN\t-\tB\u00c0I GI\u1ea2I\t-\t\u0110\u00c1P\tS\u1ed0 B\u00c0I\tS\u1ed0\t1 C\u00c2U\t1: B\u00e0i\tgi\u1ea3i: T\u1eeb\t2\t\u0111\u1ebfn\t1000\tc\u00f3:\t(1000\t-\t2)\t:\t2\t+\t1\t=\t500\t(s\u1ed1\tch\u1eb5n). T\u1ed5ng\tc\u00e1c\ts\u1ed1\t\u0111\u00f3:\tN\t=\t(1000\t+\t2)\tx\t500\t:\t2\t=\t250500.\tS\u1ed1\tn\u00e0y\tchia h\u1ebft\tcho\t4. Khi\tthay\t+\ta\tth\u00e0nh\t-\ta\tth\u00ec\tN\tb\u1ecb\tgi\u1ea3m\t\u0111i\ta\tx\t2\tc\u0169ng\tl\u00e0\ts\u1ed1\tchia\th\u1ebft\tcho 4.\tDo\t\u0111\u00f3\tk\u1ebft\tqu\u1ea3\tcu\u1ed1i\tc\u00f9ng\tph\u1ea3i\tl\u00e0\ts\u1ed1\tchia\th\u1ebft\tcho\t4.\tB\u00ecnh\tt\u00ednh\t\u0111\u01b0\u1ee3c 2002,\tminh\tt\u00ednh\t\u0111\u01b0\u1ee3c\t2006\t\u0111\u1ec1u\tl\u00e0\ts\u1ed1\tkh\u00f4ng\tchia\th\u1ebft\tcho\t4.\tV\u1eady\tc\u1ea3\thai b\u1ea1n\t\u0111\u1ec1u\tt\u00ednh\tsai. C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: Ta\tchia\tt\u1ea5m\tb\u00eca\tth\u00e0nh\tc\u00e1c\t\u00f4\tvu\u00f4ng\tnh\u1ecf\tb\u1eb1ng\tnhau\tnh\u01b0\ttrong\th\u00ecnh v\u1ebd\tsau:","Nh\u00ecn\th\u00ecnh\tv\u1ebd\tta\tth\u1ea5y\tt\u1ed5ng\ts\u1ed1\t\u00f4\tvu\u00f4ng\tnh\u1ecf\tl\u00e0\t18\t\u00f4.\tDo\t\u0111\u00f3\tkhi\tchia t\u1ea5m\tb\u00eca\tth\u00e0nh\t6\tph\u1ea7n\tgi\u1ed1ng\th\u1ec7t\tnhau\tv\u1ec1\th\u00ecnh\td\u1ea1ng\tth\u00ec\tm\u1ed7i\tph\u1ea7n\ts\u1ebd\tc\u00f3 s\u1ed1\t\u00f4\tl\u00e0:\t18\t:\t6\t=\t3\t(\u00f4)\tv\u00e0\th\u00ecnh\td\u1ea1ng\tm\u1ed7i\tph\u1ea7n\tph\u1ea3i\tc\u00f3\td\u1ea1ng\th\u00ecnh\tch\u1eef\tL. Ta\tc\u00f3\tc\u00e1ch\tchia\tnh\u01b0\tsau\t(c\u1eaft\ttheo\t\u0111\u01b0\u1eddng\tk\u1ebb\t\u0111\u1eadm): C\u00c2U\t3: G\u1ee3i\t\u00fd: Bi\u1ec3u\tth\u1ecb\ts\u1ed1\tng\u01b0\u1eddi\tl\u00e0\t1\t\u0111o\u1ea1n\tth\u1eb3ng\tth\u00ec\ts\u1ed1\tb\u00f4ng\tg\u1ed3m\t5\t\u0111o\u1ea1n\tth\u1eb3ng nh\u01b0\tth\u1ebf\tv\u00e0\tth\u00eam\t5\tn\u1eefa.","N\u1ebfu\tth\u00eam\t6\tv\u00e0o\ts\u1ed1\tb\u00f4ng\tn\u00f3i\ttr\u00ean\tth\u00ec\t\u0111\u1ee7\tcho\tm\u1ed7i\tng\u01b0\u1eddi\t6\tqu\u1ea3. Ta\tc\u00f3\ts\u01a1\t\u0111\u1ed3: S\u1ed1\tng\u01b0\u1eddi\t S\u1ed1\tb\u00f4ng\t S\u1ed1\tb\u00f4ng\tth\u00eam\t6\tqu\u1ea3 \u0110\u00e1p\ts\u1ed1: 11\tng\u01b0\u1eddi\t 60\tqu\u1ea3\tb\u00f4ng. C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1: 118\tchia\t3\t=\t39\td\u01b0\t1 118\tchia\t4\t=\t29\td\u01b0\t2 118\tchia\t5\t=\t23\td\u01b0\t3 =\t118\tb\u1eadc\tthang. B\u00c0I\tS\u1ed0\t2","C\u00c2U\t1: \u0110\u00e1p\ts\u1ed1: H\u00ecnh\tb. C\u00c2U\t2: B\u00e0i\tgi\u1ea3i: S\u1ebd\tx\u1ea3y\tra\tm\u1ed9t\ttrong\thai\ttr\u01b0\u1eddng\th\u1ee3p:\tC\u1ea3\thai\ts\u1ed1\t\u0111\u1ec1u\tch\u1eb5n\t(ho\u1eb7c\t\u0111\u1ec1u l\u1ebb);\tm\u1ed9t\ts\u1ed1\tch\u1eb5n\tv\u00e0\tm\u1ed9t\ts\u1ed1\tl\u1ebb. a.\tHai\ts\u1ed1\tch\u1eb5n\t(ho\u1eb7c\thai\ts\u1ed1\tl\u1ebb).\tT\u1ed5ng,\thi\u1ec7u\tc\u1ee7a\thai\ts\u1ed1\t\u0111\u00f3\tl\u00e0\ts\u1ed1 ch\u1eb5n.\tS\u1ed1\tch\u1eb5n\tnh\u00e2n\tv\u1edbi\tch\u00ednh\tn\u00f3\t\u0111\u01b0\u1ee3c\ts\u1ed1\tch\u1eb5n.\tDo\t\u0111\u00f3\tc\u1ed9ng\thai\tt\u00edch (l\u00e0\thai\ts\u1ed1\tch\u1eb5n)\tph\u1ea3i\t\u0111\u01b0\u1ee3c\ts\u1ed1\tch\u1eb5n. b.\tM\u1ed9t\ts\u1ed1\tch\u1eb5n\tv\u00e0\tm\u1ed9t\ts\u1ed1\tl\u1ebb.\tT\u1ed5ng,\thi\u1ec7u\tc\u1ee7a\tch\u00fang\t\u0111\u1ec1u\tl\u00e0\ts\u1ed1\tl\u1ebb.\tS\u1ed1 l\u1ebb\tnh\u00e2n\tv\u1edbi\tch\u00ednh\tn\u00f3\t\u0111\u01b0\u1ee3c\ts\u1ed1\tl\u1ebb.\tDo\t\u0111\u00f3\tc\u1ed9ng\thai\tt\u00edch\t(l\u00e0\thai\ts\u1ed1\tl\u1ebb)\tph\u1ea3i \u0111\u01b0\u1ee3c\ts\u1ed1\tch\u1eb5n. V\u1eady\ttheo\t\u0111i\u1ec1u\tki\u1ec7n\t\u0111\u00e3\tcho\tth\u00ec\tk\u1ebft\tqu\u1ea3\tc\u1ee7a\tb\u00e0i\tto\u00e1n\tph\u1ea3i\tl\u00e0\ts\u1ed1\tch\u1eb5n. C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: Gi\u1ea3\ts\u1eed\ts\u1ed1\tb\u00f3\tc\u1ecf\tm\u00e0\tm\u1ed7i\tlo\u1ea1i\ttr\u00e2u\t\u0103n\t\u0111\u1ec1u\tt\u0103ng\tl\u00ean\tg\u1ea5p\tba. Th\u1ebf\tth\u00ec\tta\tc\u00f3\tb\u00e0i\tto\u00e1n:\t\u201cC\u00f3\t100\tcon\ttr\u00e2u\tv\u00e0\t300\tb\u00f3\tc\u1ecf.\tM\u1ed7i\tcon tr\u00e2u\t\u0111\u1ee9ng\t\u0103n\t15\tb\u00f3\t(5\tx\t3\t=\t15),\tm\u1ed7i\tcon\ttr\u00e2u\tn\u1eb1m\t\u0103n\t9\tb\u00f3\t(3\tx\t3\t=\t9), m\u1ed7i\tcon\ttr\u00e2u\tgi\u00e0\t\u0103n\t1\tb\u00f3.\tH\u1ecfi\tc\u00f3\tbao\tnhi\u00eau\ttr\u00e2u\t\u0111\u1ee9ng,\ttr\u00e2u\tn\u1eb1m,\ttr\u00e2u gi\u00e0?\u201d. Ta\tk\u00ed\thi\u1ec7u\ts\u1ed1\ttr\u00e2u\t\u0111\u1ee9ng\tl\u00e0\t\u0111,\ts\u1ed1\ttr\u00e2u\tn\u1eb1m\tl\u00e0\tN,\ts\u1ed1\ttr\u00e2u\tgi\u00e0\tl\u00e0\tg.\tTh\u1ebf th\u00ec\tt\u1ed5ng\ts\u1ed1\tb\u00f3\tc\u1ecf\tm\u00e0\tm\u1ed7i\tlo\u1ea1i\ttr\u00e2u\t\u0103n\tl\u00e0:","Tr\u00e2u\t\u0111\u1ee9ng Tr\u00e2u\tn\u1eb1m Tr\u00e2u\tgi\u00e0 100\tcon\ttr\u00e2u\t300\tb\u00f3\tc\u1ecf Nh\u00ecn\tv\u00e0o\ts\u01a1\t\u0111\u1ed3\tta\tth\u1ea5y: \u0110\tx\t15\t+\tN\tx\t9\t+\tg\t=\t300\t(b\u00f3\tc\u1ecf) V\u1eady\tta\tc\u00f3: \u0110\tx\t14\t+\tN\tx\t8\t=\t300\t\u2013\t100\t=\t200 Chia\t\u0111\u00f4i\tta\t\u0111\u01b0\u1ee3c: \u0110\tx\t7\t+\tN\tx\t4\t=\t100\t(1) \u0110\tx\t3\t+\t\u0110\tx\t4\t+\tN\tx\t4\t=\t25\tx\t4 \u0110\tx\t3\t=\t25\tx\t4\t\u2013\t\u0110\tx\t4\t\u2013\tN\tx\t4 \u0110\tx\t3\t=\t(25\t\u2013\t\u0110\t\u2013\tN)\tx\t4 Suy\tra\t(\u0110\tx\t3)\tchia\th\u1ebft\tcho\t4\tdo\t\u0111\u00f3\t\u0110\tchia\th\u1ebft\tcho\t4. M\u1eb7t\tkh\u00e1c\tt\u1eeb\t(1)\tta\tc\u00f3:\t\u0110\tx\t7\t<\t100\t\u2013\t4\t=\t96 V\u1eady\t\u0110\t<\t14,\tm\u1eb7t\tkh\u00e1c\t\u0110\tchia\th\u1ebft\tcho\t4,\tn\u00ean\t\u0110\tch\u1ec9\tc\u00f3\tth\u1ec3\tl\u00e0\t4,\t8\tv\u00e0 12.\tTa\tl\u1ea7n\tl\u01b0\u1ee3t\tth\u1eed\t\u0111\u1ed1i\tv\u1edbi\tt\u1eebng\tgi\u00e1\ttr\u1ecb\tc\u1ee7a\t\u0110\t\u0111\u1ec3\tt\u00ecm\tc\u00e1c\tgi\u00e1\ttr\u1ecb\tt\u01b0\u01a1ng","\u1ee9ng\tc\u1ee7a\tN\tv\u00e0\tG,\tv\u00e0\tghi\tk\u1ebft\tqu\u1ea3\tv\u00e0o\tb\u1ea3ng\tsau: Tr\u00e2u\t\u0111\u1ee9ng Tr\u00e2u\tn\u1eb1m Tr\u00e2u\tgi\u00e0 S\u1ed1\tc\u1ecf S\u1ed1\tcon S\u1ed1\tc\u1ecf S\u1ed1\tcon S\u1ed1\tc\u1ecf S\u1ed1\tcon 54 78 26 4 20 18 33 81 27 8 40 11 12 84 28 12 60 4 (Trong\tkhi\tt\u00ednh\tto\u00e1n,\tta\tt\u00ednh\ts\u1ed1\tb\u00f3\tc\u1ecf\tm\u1ed7i\tlo\u1ea1i\ttr\u00e2u\t\u0103n\ttheo\t\u0111\u1ea7u\tb\u00e0i g\u1ed1c:\ttr\u00e2u\t\u0111\u1ee9ng\t\u0103n\tn\u0103m,\ttr\u00e2u\tn\u1eb1m\t\u0103n\tba,\ttr\u00e2u\tgi\u00e0\t3\tcon\t1\tb\u00f3). V\u1eady\tb\u00e0i\tto\u00e1n\tc\u00f3\t3\t\u0111\u00e1p\ts\u1ed1:\ts\u1ed1\ttr\u00e2u\t\u0111\u1ee9ng,\ttr\u00e2u\tn\u1eb1m,\ttr\u00e2u\tgi\u00e0\tl\u1ea7n\tl\u01b0\u1ee3t l\u00e0: (4,\t18,\t78);\tho\u1eb7c\t(8,\t11,\t81);\tho\u1eb7c\t(12,\t4,\t84). Ghi\tch\u00fa: Khi\tgi\u1ea3i\tb\u00e0i\tto\u00e1n\ttr\u00ean\tta\t\u0111\u00e3\txem\tx\u00e9t\tt\u1ea5t\tc\u1ea3\tc\u00e1c\ttr\u01b0\u1eddng\th\u1ee3p\tc\u00f3\tth\u1ec3 x\u1ea3y\tra\ttrong\tb\u00e0i,\tr\u1ed3i\tl\u1ea7n\tl\u01b0\u1ee3t\tki\u1ec3m\ttra\txem\ttr\u01b0\u1eddng\th\u1ee3p\tn\u00e0o\tb\u1ecb\tlo\u1ea1i, tr\u01b0\u1eddng\th\u1ee3p\tn\u00e0o\tch\u1ea5p\tnh\u1eadn\t\u0111\u01b0\u1ee3c.\tC\u00e1ch\tgi\u1ea3i\tnh\u01b0\tv\u1eady\tg\u1ecdi\tl\u00e0\tgi\u1ea3i\ttheo ph\u01b0\u01a1ng\tph\u00e1p\tl\u1ef1a\tch\u1ecdn. C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: V\u00ec\ts\u1ee3i\td\u00e2y\tch\u1ec9\tc\u1ed9t\tv\u00e0o\tc\u1ed5\tcon\tng\u1ef1a\tm\u1ed9t\t\u0111\u1ea7u,\tnh\u01b0ng\t\u0111\u1ea7u\ts\u1ee3i\td\u00e2y\tkia l\u1ea1i\tkh\u00f4ng\tbu\u1ed9c\tv\u00e0o\tc\u1ecdc\tn\u00ean\tcon\tng\u1ef1a\tc\u00f3\tth\u1ec3\tt\u1ef1\tdo\t\u0103n\t\u0111\u1ed1ng\tc\u1ecf. B\u00c0I\tS\u1ed0\t3 C\u00c2U\t1:","C\u00e1ch\t1: 3\t=\t1\tx\t1\tx\t3 12\t=\t2\tx\t2\tx\t3 27\t=\t3\tx\t3\tx\t3 75\t=\t5\tx\t5\tx\t3 Ta\tc\u00f3\t\u0111\u00e1p\ts\u1ed1:\t48\t=\t4\tx\t4\tx\t3 C\u00e1ch\t2: C\u00e1ch\t3: C\u00c2U\t2:","\u0110\u00e1p\ts\u1ed1\t1: 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. \u0110\u00e1p\ts\u1ed1:\t60. \u0110\u00e1p\ts\u1ed1\t2: \u0110\u00e1p\ts\u1ed1\t3: C\u00c2U\t3:","B\u00e0i\tgi\u1ea3i: C\u00f3\tnhi\u1ec1u\tc\u00e1ch\tl\u00e0m,\txin\tgi\u1edbi\tthi\u1ec7u\t2\tc\u00e1ch\t\u0111\u1ec3\tc\u00e1c\tb\u1ea1n\ttham\tkh\u1ea3o. C\u00e1ch\t1:\tDi\u1ec7n\tt\u00edch\th\u00ecnh\tsao\t\u0111\u00fang\tb\u1eb1ng\tdi\u1ec7n\tt\u00edch\th\u00ecnh\tvu\u00f4ng\tg\u1ed3m 16\t\u00f4\tvu\u00f4ng\ttr\u1eeb\t\u0111i\tdi\u1ec7n\tt\u00edch\t4\th\u00ecnh\ttam\tgi\u00e1c\tb\u1eb1ng\tnhau.\tM\u1ed7i\ttam\tgi\u00e1c n\u00e0y\tc\u00f3\tdi\u1ec7n\tt\u00edch\tl\u00e0\t2\t\u00f4\tvu\u00f4ng.\tDo\t\u0111\u00f3\tdi\u1ec7n\tt\u00edch\th\u00ecnh\tsao\tl\u00e0:\t16\t-\t(2\tx\t4)\t= 8\t(\u00f4\tvu\u00f4ng). C\u00e1ch\t2: C\u1eaft\tgh\u00e9p\t\u0111\u1ec3\tt\u1eeb\th\u00ecnh\tsao\tta\tc\u00f3\th\u00ecnh\tm\u1edbi\tm\u00e0\th\u00ecnh\tn\u00e0y\tdi\u1ec7n\tt\u00edch \u0111\u00fang\tb\u1eb1ng\t8\t\u00f4\tvu\u00f4ng. C\u00c2U\t4: \u0110\u00e1p\ts\u1ed1: 2\tv\u1ee3\tch\u1ed3ng\t+\t6\tcon\tg\u00e1i\t+\t1\tm\u1ed9t\ttrai\t\u00fat\t=\t9\tng\u01b0\u1eddi.","C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: Gi\u1ea3i\ttheo\tph\u01b0\u01a1ng\tph\u00e1p\tgi\u1ea3\tthi\u1ebft\tt\u1ea1m\t(gi\u1ea3\tthi\u1ebft\tt\u1ea1m\tl\u00e0\tnh\u1eefng\t\u0111i\u1ec1u ta\tt\u01b0\u1edfng\tt\u01b0\u1ee3ng\tra\t\u0111\u1ec3\tgi\u00fap\tcho\tvi\u1ec7c\tgi\u1ea3i\tto\u00e1n\t\u0111\u01b0\u1ee3c\td\u1ec5\td\u00e0ng.\tCh\u1eef\t\u201ct\u1ea1m\u201d \u1edf\t\u0111\u00e2y\tng\u1ee5\t\u00fd\t\u201cnh\u1eefng\t\u0111i\u1ec1u\tm\u00e0\tta\tt\u01b0\u1edfng\tt\u01b0\u1ee3ng\tra\t\u1ea5y\tch\u1ec9\tc\u00f3\t\u00fd\tngh\u0129a\tnh\u1ea5t th\u1eddi,\tl\u00fac\tgi\u1ea3i\tto\u00e1n\tth\u00ec\tta\tc\u1ea7n\t\u0111\u1ebfn\tch\u00fang,\tkhi\tgi\u1ea3i\txong\tth\u00ec\tc\u00f3\tth\u1ec3\tqu\u00ean ch\u00fang\t\u0111i\u201d. C\u00e1ch\t1: Gi\u1ea3\ts\u1eed\tm\u1ed7i\tcon\tch\u00f3\t\u0111\u1ec1u\tch\u1ec9\t\u0111\u1ee9ng\tb\u1eb1ng\thai\tch\u00e2n\tsau\tv\u00e0\tco\thai\tch\u00e2n tr\u01b0\u1edbc\tl\u00ean\t(gi\u1ed1ng\tnh\u01b0\tcon\tch\u00f3\tl\u00e0m\txi\u1ebfc\tv\u1eady)\tth\u1ebf\tth\u00ec\tm\u1ed7i\tcon\tch\u00f3\t\u0111\u1ec1u ch\u1ec9\tc\u00f3\thai\tch\u00e2n\tv\u00e0\tta\tc\u00f3\tth\u1ec3\tcoi\t36\tcon\t\u0111\u1ec1u\tl\u00e0\tg\u00e0\tc\u1ea3. L\u00fac\t\u0111\u00f3\t36\tcon\tc\u00f3: 36\tx\t2\t=\t72\t(ch\u00e2n) V\u1eady\ts\u1ed1\tch\u00e2n\tco\tl\u00ean\tl\u00e0: 100\t\u2013\t72\t=\t28\t(ch\u00e2n) Suy\tra\ts\u1ed1\tch\u00f3\tl\u00e0: 28\t:\t2\t=\t14\t(con) S\u1ed1\tg\u00e0\tl\u00e0: 36\t\u2013\t14\t=\t22\t(con) Ghi\tch\u00fa: C\u00f3\tth\u1ec3\tcoi\tgi\u1ea3\tthi\u1ebft\tt\u1ea1m\t\u1edf\t\u0111\u00e2y\tl\u00e0\tt\u00ecnh\thu\u1ed1ng\t\u201cM\u1ed7i\tcon\tch\u00f3\tch\u1ec9\tc\u00f3 hai\tch\u00e2n\u2026\u201d\tho\u1eb7c\tb\u00e0i\tto\u00e1n\t\u0111\u01b0a\tra\tl\u00e0:\t\u201cN\u1ebfu\tt\u1ea5t\tc\u1ea3\t36\tcon\tch\u00f3\t\u0111\u1ec1u\tc\u00f3\t2 ch\u00e2n...?\u201d. C\u00e1ch\t2:","Gi\u1ea3\ts\u1eed\tta\tg\u1eafn\tth\u00eam\tcho\tm\u1ed7i\tcon\tg\u00e0\t2\tch\u00e2n\tn\u1eefa\t(b\u1eb1ng\tb\u1ed9t)\tch\u1eb3ng h\u1ea1n.\tTh\u1ebf\tth\u00ec\tm\u1ed7i\tcon\tg\u00e0\t\u0111\u1ec1u\tc\u00f3\t4\tch\u00e2n\tv\u00e0\tta\tc\u00f3\tth\u1ec3\tcoi\tc\u1ea3\t36\tcon\t\u0111\u1ec1u\tl\u00e0 ch\u00f3\tc\u1ea3. L\u00fac\t\u0111\u00f3\t36\tcon\tch\u00f3: 36\tx\t4\t=\t144\t(ch\u00e2n) S\u1ed1\tch\u00e2n\tg\u00e0\t\u0111\u00e3\tg\u1eafn\tth\u00eam\tl\u00e0: 144\t\u2013\t100\t=\t44\t(ch\u00e2n) S\u1ed1\tg\u00e0\tl\u00e0: 44\t:\t2\t=\t22\t(con) S\u1ed1\tch\u00f3\tl\u00e0: 36\t\u2013\t22\t=\t14\t(con) Ghi\tch\u00fa: C\u00f3\tth\u1ec3\tcoi\tgi\u1ea3\tthi\u1ebft\tt\u1ea1m\t\u1edf\t\u0111\u00e2y\tl\u00e0\tt\u00ecnh\thu\u1ed1ng\t\u201cM\u1ed7i\tcon\tg\u00e0\t\u0111\u1ec1u\tc\u00f3\t4 ch\u00e2n\u2026\u201d\tho\u1eb7c\tb\u00e0i\tto\u00e1n\t\u0111\u01b0a\tra\tl\u00e0\t\u201cN\u1ebfu\t36\tcon\t\u0111\u1ec1u\tl\u00e0\tch\u00f3\tc\u1ea3\tth\u00ec\tc\u00f2n thi\u1ebfu\tbao\tnhi\u00eau\tc\u00e1i\tch\u00e2n?\u201d. C\u00e1ch\t3: Gi\u1ea3\ts\u1eed\tta\t\u201cch\u1eb7t\tb\u1edbt\u201d\t\u0111i\tm\u1ed9t\tn\u1eeda\ts\u1ed1\tch\u00e2n\tg\u00e0\tv\u00e0\tch\u00f3.\tT\u1ee9c\tl\u00e0\tm\u1ed7i\tcon ch\u00f3\tch\u1ec9\tc\u00f3\thai\tch\u00e2n\tv\u00e0\tm\u1ed7i\tcon\tg\u00e0\tch\u1ec9\tc\u00f3\t1\tch\u00e2n.\tL\u00fac\t\u0111\u00f3\tta\tc\u00f3\tb\u00e0i\tto\u00e1n: \u201cV\u1eeba\tg\u00e0\tv\u1eeba\tch\u00f3 B\u00f3\tl\u1ea1i\tcho\ttr\u00f2n Ba\tm\u01b0\u01a1i\ts\u00e1u\tcon N\u0103m\tm\u01b0\u01a1i\tch\u00e2n\tch\u1eb5n\u201d. H\u1ecfi\tc\u00f3\tbao\tnhi\u00eau\tcon\tg\u00e0,\tbao\tnhi\u00eau\tcon\tch\u00f3?","Trong\tb\u00e0i\tto\u00e1n\ttr\u00ean\t\u0111\u00e3\tn\u00eau\tt\u1ea5t\tc\u1ea3\t36\tcon\t\u0111\u1ec1u\tl\u00e0\tg\u00e0\tc\u1ea3\tth\u00ec\tta\tc\u00f3\t36 ch\u00e2n.\tS\u1ed1\tch\u00e2n\tth\u1eeba\tra\tl\u00e0: 50\t\u2013\t36\t=\t14\t(ch\u00e2n) M\u1ed7i\tcon\tch\u00f3\tth\u1eeba\tra\tm\u1ed9t\tch\u00e2n\tm\u00e0\tth\u1eeba\tra\tt\u1ea5t\tc\u1ea3\t14\tch\u00e2n.\tV\u1eady\tc\u00f3 14\tcon\tch\u00f3 Suy\tra\ts\u1ed1\tg\u00e0\tl\u00e0: 36\t\u2013\t14\t=\t22\t(con) C\u00e1ch\t4 Gi\u1ea3\ts\u1eed\tc\u00f3\t18\tcon\tg\u00e0\tv\u00e0\t18\tcon\tch\u00f3\t(c\u00f3\tth\u1ec3\tgi\u1ea3\ts\u1eed\tc\u00f3\t\u201c20\tcon\tg\u00e0\tv\u00e0 16\tcon\tch\u00f3\u201d\tho\u1eb7c\t10\tcon\tg\u00e0\tv\u00e0\t26\tcon\tch\u00f3\u201d...\tMi\u1ec5n\tsao\t\u201ct\u1ed5ng\ts\u1ed1\tg\u00e0\tv\u00e0 ch\u00f3\tb\u1eb1ng\t36\tcon\tl\u00e0\t\u0111\u01b0\u1ee3c\u201d). L\u00fac\t\u0111\u00f3\tt\u1ed5ng\ts\u1ed1\tch\u00e2n\tg\u00e0\tv\u00e0\tch\u00f3\ts\u1ebd\tl\u00e0: 18\tx\t2\t+\t18\tx\t4\t=\t108\t(ch\u00e2n) Nh\u01b0ng\tth\u1ef1c\tt\u1ebf\tch\u1ec9\tc\u00f3\t100\tch\u00e2n\tn\u00ean\tph\u1ea3i\tt\u00ecm\tc\u00e1ch\tr\u00fat\tb\u1edbt\t\u0111i\t8 ch\u00e2n\tm\u00e0\tt\u1ed5ng\ts\u1ed1\tcon\tv\u1eabn\tkh\u00f4ng\tthay\t\u0111\u1ed5i. Ta\tth\u1ea5y:\tn\u1ebfu\tthay\t1\tcon\tch\u00f3\tb\u1eb1ng\t1\tcon\tg\u00e0\tth\u00ec\tt\u1ed5ng\ts\u1ed1\tcon\tv\u1eabn kh\u00f4ng\tthay\t\u0111\u1ed5i\tnh\u01b0ng\tt\u1ed5ng\ts\u1ed1\tch\u00e2n\ts\u1ebd\tgi\u1ea3m\t\u0111i: 4\t\u2013\t2\t=\t2\t(ch\u00e2n) V\u1eady\tmu\u1ed1n\tcho\tt\u1ed5ng\ts\u1ed1\tch\u00e2n\tgi\u1ea3m\t\u0111i\t8\tth\u00ec\ts\u1ed1\tcon\tch\u00f3\tph\u1ea3i\tthay b\u1eb1ng\tg\u00e0\tl\u00e0: 8\t:\t2\t=\t4\t(con) Do\t\u0111\u00f3\ts\u1ed1\tg\u00e0\tl\u00e0: 18\t+\t4\t=\t22\t(con\t) S\u1ed1\tch\u00f3\tl\u00e0:","36\t\u2013\t22\t=\t14\t(con) \u0110\u00e1p\ts\u1ed1:\t22\tcon\tg\u00e0 14\tcon\tch\u00f3. B\u00c0I\tS\u1ed0\t4 C\u00c2U\t1: S\u1ed1\tghi\td\u01b0\u1edbi\tm\u1ed7i\th\u00ecnh\tl\u00e0\ts\u1ed1\tgiao\t\u0111i\u1ec3m\tm\u00e0\tc\u00e1c\t\u0111\u01b0\u1eddng\tth\u1eb3ng\tc\u00f3 trong\th\u00ecnh\t\u0111\u00f3\tc\u1eaft\tnhau.\tH\u00ecnh\tth\u1ee9\tnh\u1ea5t\tc\u00f3\t1\tgiao\t\u0111i\u1ec3m\tgiao\tnhau,\th\u00ecnh th\u1ee9\thai\tc\u00f3\t3\tgiao\t\u0111i\u1ec3m\tgiao\tnhau,\th\u00ecnh\tth\u1ee9\tba\tc\u00f3\t4\tgiao\t\u0111i\u1ec3m\tgiao nhau\tv\u00e0\th\u00ecnh\tth\u1ee9\tt\u01b0\tc\u00f3\t2\tgiao\t\u0111i\u1ec3m\tgiao\tnhau.\tV\u1eady\ts\u1ed1\t\u0111i\u1ec1n\tv\u00e0o\td\u1ea5u ch\u1ea5m\th\u1ecfi\tl\u00e0\ts\u1ed1\t2. C\u00c2U\t2: S\u1ed1\tghi\td\u01b0\u1edbi\tm\u1ed7i\th\u00ecnh\tl\u00e0\ts\u1ed1\tph\u1ea7n\tm\u1eb7t\tph\u1eb3ng\tm\u00e0\tc\u00e1c\t\u0111\u01b0\u1eddng\tth\u1eb3ng c\u00f3\ttrong\th\u00ecnh\t\u0111\u00f3\tchia\tra.\tH\u00ecnh\tth\u1ee9\tnh\u1ea5t\tc\u00f3\t4\tph\u1ea7n,\th\u00ecnh\tth\u1ee9\thai\tc\u00f3\t7 ph\u1ea7n,\th\u00ecnh\tth\u1ee9\tba\tc\u00f3\t9\tph\u1ea7n\tv\u00e0\th\u00ecnh\tth\u1ee9\t4\tc\u00f3\t6\tph\u1ea7n.\tV\u1eady\ts\u1ed1\t\u0111i\u1ec1n\tv\u00e0o d\u1ea5u\th\u1ecfi\tch\u1ea5m\tl\u00e0\ts\u1ed1\t6.","C\u00c2U\t3: B\u00e0i\tgi\u1ea3i: Ta\tchuy\u1ec3n\tque\tdi\u00eam\t\u1edf\tgi\u1eefa\ts\u1ed1\t8\t\u0111\u1ec3\tc\u00f3\tch\u1eef\ts\u1ed1\t0,\tl\u1ea5y\tque\tdi\u00eam\t\u0111\u00f3 gh\u00e9p\tv\u00e0o\tch\u1eef\ts\u1ed1\t5\tc\u1ee7a\ts\u1ed1\t502\t\u0111\u1ec3\t\u0111\u01b0\u1ee3c\ts\u1ed1\t602. L\u1ea5y\t1\tque\tdi\u00eam\t\u1edf\tch\u1eef\ts\u1ed1\t2\tc\u1ee7a\ts\u1ed1\t602\tv\u00e0\t\u0111\u1eb7t\tv\u00e0o\tv\u1ecb\ttr\u00ed\tkh\u00e1c\tc\u1ee7a ch\u1eef\ts\u1ed1\t2\t\u0111\u00f3\t\u0111\u1ec3\tchuy\u1ec3n\ts\u1ed1\t602\tth\u00e0nh\ts\u1ed1\t603,\tta\tc\u00f3\tph\u00e9p\tt\u00ednh\t\u0111\u00fang: C\u00c2U\t4: B\u00e0i\tgi\u1ea3i: N\u00f3\tl\u00e0\ts\u1ed1\tl\u1ebb\tn\u1eb1m\ttrong\tph\u1ea1m\tvi\tc\u00e1c\ts\u1ed1\tt\u1ef1\tnhi\u00ean\tt\u1eeb\t1\t\u0111\u1ebfn\t58,\tkhi\tvi\u1ebft n\u00f3\tkh\u00f4ng\ts\u1eed\td\u1ee5ng\tc\u00e1c\tch\u1eef\ts\u1ed1\t1;\t2;\t3\tn\u00ean\tn\u00f3\tc\u00f3\tth\u1ec3\tl\u00e0:\t5;\t7;\t9;\t45;\t47; 49;\t55;\t57. Nh\u01b0ng\tn\u00f3\tkh\u00f4ng\tchia\th\u1ebft\tcho\t3;\t5;\t7\tn\u00ean\ttrong\tc\u00e1c\ts\u1ed1\ttr\u00ean\tch\u1ec9\tc\u00f3 s\u1ed1\t47\tl\u00e0\tth\u1ecfa\tm\u00e3n.\tV\u1eady\tn\u00f3\tl\u00e0\ts\u1ed1\t47.","C\u00c2U\t5: B\u00e0i\tgi\u1ea3i: C\u00f3\tm\u1ed7i\tm\u1ed9t\tque\tdi\u00eam\tth\u00ec\tl\u00e0m\tsao\tm\u00e0\tth\u1eafp?\tQu\u1ec7t\tv\u00e0o\tt\u01b0\u1eddng\tl\u00e0m sao\tch\u00e1y?\tN\u00ean\tkh\u00f4ng\tth\u1eafp\t\u0111\u01b0\u1ee3c. C\u00c2U\t6: H\u01b0\u1edbng\td\u1eabn: A:\t2 B\t-\t1 C:\t2 D\t-\t2 E:\t2 G\t-\t3\tH Ta\td\u00f9ng\tl\u01b0u\t\u0111\u1ed3\ttr\u00ean\t\u0111\u1ec3\tnghi\u00ean\tc\u1ee9u\tb\u00e0i\tto\u00e1n: -\tV\u00f2ng\ttr\u00f2n\tA\tch\u1ec9\ts\u1ed1\tm\u1eadn\tl\u00fac\t\u0111\u1ea7u. -\tV\u00f2ng\ttr\u00f2n\tB\tch\u1ec9\ts\u1ed1\tm\u1eadn\tc\u00f2n\tl\u1ea1i\tsau\tkhi\t\u0111\u00e3\tcho\tb\u1edbt\tm\u1ed9t\tn\u1eeda. -\tV\u00f2ng\ttr\u00f2n\tC\tch\u1ec9\ts\u1ed1\tm\u1eadn\tc\u00f2n\tl\u1ea1i\tsau\tkhi\t\u0111\u00e3\tcho\tb\u1edbt\tm\u1ed9t\tqu\u1ea3\tn\u1eefa. -\tV\u00f2ng\ttr\u00f2n\tD\tch\u1ec9\ts\u1ed1\tm\u1eadn\tc\u00f2n\tl\u1ea1i\tsau\tkhi\t\u0111\u00e3\tcho\tb\u1edbt\tm\u1ed9t\tn\u1eeda\tn\u1eefa. ... Ta\tth\u1ea5y\tr\u1eb1ng:\tA\t:\t2\t=\tB V\u1eady\tta\tvi\u1ebft\td\u1ea5u\t\u201c:\t2\u201d\tl\u00ean\tb\u00ean\ttr\u00ean\tm\u0169i\tt\u00ean\tn\u1ed1i\tt\u1eeb\tA\t\u0111\u1ebfn\tB. L\u1ea1i\tc\u00f3\tB\t\u2013\t1\t=\tC V\u1eady\tta\tvi\u1ebft\td\u1ea5u\t\u201c-\t1\u201d\tl\u00ean\tb\u00ean\ttr\u00ean\tm\u0169i\tt\u00ean\tn\u1ed1i\tt\u1eeb\tB\t\u0111\u1ebfn\tC.","... C\u1ee9\tnh\u01b0\tv\u1eady\tta\tc\u00f3\tl\u01b0u\t\u0111\u1ed3\ttr\u00ean.\tBi\u1ebft\tr\u1eb1ng\th\t=\t0\tta\tc\u00f3\tth\u1ec3\t\u0111i\tng\u01b0\u1ee3c tr\u1edf\tl\u1ea1i\t\u0111\u1ec3\tt\u00ecm\ta\tb\u1eb1ng\tc\u00e1ch\t\u0111\u1ea3o\tng\u01b0\u1ee3c\tc\u00e1c\tph\u00e9p\tt\u00ednh\tnh\u01b0\tsau: 34\tx\t2 17\t+\t1 16\tx\t2 8\t+\t2 6\tx\t2 V\u1eady\tl\u00fac\t\u0111\u1ea7u\ttrong\tgi\u1ecf\tc\u00f3\t34\tqu\u1ea3\tm\u1eadn. B\u00e0i\tgi\u1ea3i: Sau\tkhi\tcho\tho\u00e0ng\tt\u1eed\tth\u1ee9\tba,\ttrong\tgi\u1ecf\tc\u00f2n: (0\t+\t3)\tx\t2\t=\t6\t(qu\u1ea3\tm\u1eadn) Sau\tkhi\tcho\tho\u00e0ng\tt\u1eed\tth\u1ee9\thai,\ttrong\tgi\u1ecf\tc\u00f2n: (6\t+\t2)\tx\t2\t=\t16\t(qu\u1ea3\tm\u1eadn) L\u00fac\t\u0111\u1ea7u\ttrong\tgi\u1ecf\tc\u00f3: (16\t+\t1)\tx\t2\t=\t34\t(qu\u1ea3\tm\u1eadn) \u0110\u00e1p\ts\u1ed1:\t34\t(qu\u1ea3\tm\u1eadn). B\u00c0I\tS\u1ed0\t5 C\u00c2U\t1: \u0110\u00e1p\ts\u1ed1: \u0110i\u1ec1n\ts\u1ed1\t2\tv\u00e0o\td\u1ea5u\tch\u1ea5m\th\u1ecfi."]