{"common":{"save":0,"post_id":"7629","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1267","post_id":"7629","mon_id":"1159414","chapter_id":"1159417","question":"<p>Xe th\u1ee9 nh\u1ea5t ch\u1edf \u0111\u01b0\u1ee3c 10 t\u1ea1 g\u1ea1o, xe th\u1ee9 hai ch\u1edf \u0111\u01b0\u1ee3c nhi\u1ec1u h\u01a1n xe th\u1ee9 nh\u1ea5t 4 y\u1ebfn g\u1ea1o. Xe th\u1ee9 ba ch\u1edf \u0111\u01b0\u1ee3c s\u1ed1 g\u1ea1o b\u1eb1ng <span class=\"math-tex\">$\\dfrac{1}{4}$<\/span> s\u1ed1 g\u1ea1o mà xe th\u1ee9 nh\u1ea5t và xe th\u1ee9 hai ch\u1edf \u0111\u01b0\u1ee3c. V\u1eady c\u1ea3 ba xe ch\u1edf \u0111\u01b0\u1ee3c s\u1ed1 kg g\u1ea1o là:<\/p>","options":["<strong>A.<\/strong> 2550 kg","<strong>B.<\/strong> 2050 kg","<strong>C.<\/strong> 2500 kg","<strong>D.<\/strong> 2000 kg"],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 2550 kg<\/span><\/p><p>\u0110\u1ed5i \u0111\u01a1n v\u1ecb: 10 t\u1ea1 = 1000 kg; 4 y\u1ebfn = 40 kg<\/p><p>Xe th\u1ee9 hai ch\u1edf \u0111\u01b0\u1ee3c s\u1ed1 kg g\u1ea1o là: 1000 + 40 = 1040 (kg)<\/p><p>T\u1ed5ng s\u1ed1 kg g\u1ea1o mà xe th\u1ee9 nh\u1ea5t và xe th\u1ee9 hai ch\u1edf \u0111\u01b0\u1ee3c là: 1000 + 1040 = 2040 (kg)<\/p><p>Xe th\u1ee9 ba ch\u1edf \u0111\u01b0\u1ee3c s\u1ed1 kg g\u1ea1o là: <span class=\"math-tex\">$\\dfrac{1}{4}$<\/span> x 2040 = 510 (kg)<\/p><p>C\u1ea3 ba xe ch\u1edf \u0111\u01b0\u1ee3c: 1000 + 1040 + 510 = 2550 (kg)<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"0","date":"2024-09-11 01:30:40","option_type":"txt","len":0},{"id":"1268","post_id":"7629","mon_id":"1159414","chapter_id":"1159417","question":"<p>M\u1ed9t hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là 3m 4dm, chi\u1ec1u r\u1ed9ng 9 dm. Chu vi hình ch\u1eef nh\u1eadt \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 76 dm","<strong>B.<\/strong> 86 dm","<strong>C.<\/strong> 96 dm","<strong>D.<\/strong> 92 dm"],"correct":"2","level":"2","hint":"<p>\u0110\u1ed5i chi\u1ec1u dài sang \u0111\u01a1n v\u1ecb \u0111o cùng v\u1edbi chi\u1ec1u r\u1ed9ng và áp d\u1ee5ng công th\u1ee9c tính chu vi hình ch\u1eef nh\u1eadt.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 86 dm<\/span><\/p><p>\u0110\u1ed5i \u0111\u01a1n v\u1ecb: 3m 4dm = 34dm<\/p><p>Chu vi hình ch\u1eef nh\u1eadt là: (34+9) x 2 = 86 (dm)<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-11 01:32:18","option_type":"txt","len":0},{"id":"1269","post_id":"7629","mon_id":"1159414","chapter_id":"1159417","question":"<p>Cô giáo giao cho c\u1ea3 l\u1edbp 4 bài t\u1eadp. B\u1ea1n Mai th\u1ef1c hi\u1ec7n xong 4 bài trong 10 phút 36 giây. Th\u1eddi gian làm m\u1ed7i bài là nh\u01b0 nhau. H\u1ecfi Mai làm 3 bài trong bao nhiêu giây?<\/p>","options":["<strong>A.<\/strong> 159 giây","<strong>B.<\/strong> 467 giây","<strong>C.<\/strong> 477 giây","<strong>D.<\/strong> 417 giây"],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 477 giây<\/span><\/p><p>\u0110\u1ed5i \u0111\u01a1n v\u1ecb: 10 phút 36 giây = 636 giây<\/p><p>B\u1ea1n th\u1ef1c hi\u1ec7n 1 bài trong: 636 : 4 = 159 (giây)<\/p><p>V\u1eady Mai làm 3 bài trong: 159 x 3 = 477 (giây)<\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"0","date":"2024-09-11 01:34:50","option_type":"txt","len":0}]}
