{"common":{"save":0,"post_id":"4787","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8109","post_id":"4787","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm <span class=\"math-tex\">$\\dfrac{5}{6}$<\/span> c\u1ee7a 30 cm .<\/p>","options":["25 dm","25 cm","25 mm"],"correct":"2","level":"1","hint":"<p>Mu\u1ed1n tìm <span class=\"math-tex\">$\\dfrac{m}{n}$<\/span> c\u1ee7a s\u1ed1 a ta tính <span class=\"math-tex\">$a . \\dfrac{m}{n}$<\/span> .<\/p>","answer":"<p> <span class=\"math-tex\">$\\dfrac{5}{6}$<\/span> c\u1ee7a 30 cm là <span class=\"math-tex\">$\\dfrac{5}{6}$<\/span> . 30 cm = 25 cm<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> 25 cm<\/strong><\/span> .<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"1","date":"2021-10-03 02:59:57","option_type":"txt","len":0},{"id":"8110","post_id":"4787","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm <span class=\"math-tex\">$\\dfrac{2}{9}$<\/span> c\u1ee7a -54 .<\/p>","options":["12","-12","6","-6"],"correct":"2","level":"1","hint":"<p>Mu\u1ed1n tìm <span class=\"math-tex\">$\\dfrac{m}{n}$<\/span> c\u1ee7a s\u1ed1 a ta tính <span class=\"math-tex\">$a . \\dfrac{m}{n}$<\/span> .<\/p>","answer":"<p><span class=\"math-tex\">$\\dfrac{2}{9}$<\/span> c\u1ee7a -54 là <span class=\"math-tex\">$\\dfrac{2}{9}$<\/span> . (-54) = -12<\/p><p>\u0110áp án \u0111úng là <strong><span style=\"color:#16a085;\"> -12 <\/span><\/strong><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"1","date":"2021-10-03 03:01:45","option_type":"txt","len":0},{"id":"8111","post_id":"4787","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm m\u1ed9t s\u1ed1 bi\u1ebft <span class=\"math-tex\">$\u200b\u200b\\dfrac{11}{2}$<\/span> c\u1ee7a s\u1ed1 \u0111ó là 121<\/p>","options":["22","<span class=\"math-tex\">$\\dfrac{1331}{2}$<\/span>","-22","<span class=\"math-tex\">$-\\dfrac{1331}{2}$<\/span>"],"correct":"1","level":"1","hint":"<p>Mu\u1ed1n tìm m\u1ed9t s\u1ed1 khi bi\u1ebft <span class=\"math-tex\">$\\dfrac{m}{n}$<\/span> c\u1ee7a s\u1ed1 \u0111ó là a, ta tính a : <span class=\"math-tex\">$\\dfrac{m}{n}$<\/span><\/p>","answer":"<p>S\u1ed1 \u0111ó là 121 : <span class=\"math-tex\">$\\dfrac{11}{2}$<\/span> = 121 . <span class=\"math-tex\">$\\dfrac{2}{11}$<\/span> = 22<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> 22<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-03 03:05:02","option_type":"math","len":0}]}