{"common":{"save":0,"post_id":"7570","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1205","post_id":"7570","mon_id":"1159414","chapter_id":"1159417","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a ph&eacute;p t&iacute;nh:&nbsp;<span class=\"math-tex\">$\\dfrac{4}{13}:\\dfrac{8}{13}$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{32}{26}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{13}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$2$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{2}$<\/span>"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{1}{2}$<\/span><\/span><\/p><p><span class=\"math-tex\">$\\dfrac{4}{13}:\\dfrac{8}{13}=\\dfrac{4}{13}\\times\\dfrac{13}{8}\\n=\\dfrac{4\\times13}{13\\times4\\times2}=\\dfrac{1}{2}$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-21 12:18:10","option_type":"math","len":0},{"id":"1207","post_id":"7570","mon_id":"1159414","chapter_id":"1159417","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a ph&eacute;p t&iacute;nh:&nbsp;<span class=\"math-tex\">$12\\times \\dfrac{5}{16}$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{20}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{15}{4}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{9}$<\/span>"],"correct":"3","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{15}{4}$<\/span><\/span><\/p><p><span class=\"math-tex\">$12\\times \\dfrac{5}{16}=\\dfrac{4\\times3\\times5}{4\\times4}=\\dfrac{15}{4}$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-21 12:20:21","option_type":"math","len":0},{"id":"1208","post_id":"7570","mon_id":"1159414","chapter_id":"1159417","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a ph&eacute;p t&iacute;nh:&nbsp;<span class=\"math-tex\">$\\dfrac{7}{12}\\times\\dfrac{6}{21}:3$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{9}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{18}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{9}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{18}$<\/span>"],"correct":"2","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{1}{18}$<\/span><\/span><\/p><p><span class=\"math-tex\">$\\dfrac{7}{12}\\times\\dfrac{6}{21}:3=\\dfrac{7}{12}\\times\\dfrac{6}{21}\\times\\dfrac{1}{3}\\n=\\dfrac{7\\times3\\times2}{2\\times2\\times3\\times7\\times3\\times3}=\\dfrac{1}{2\\times3\\times3}=\\dfrac{1}{18}$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-08-21 12:24:05","option_type":"math","len":0}]}