Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"6922","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2596","post_id":"6922","mon_id":"1159012","chapter_id":"1159024","question":"<p>M\u1ed9t b\u1ee9c tranh hình ch\u1eef nh\u1eadt có di\u1ec7n tích là <span class=\"math-tex\">$\\dfrac{35}{6} $<\/span> dm² và chi\u1ec1u dài là <span class=\"math-tex\">$\\dfrac{7}{2}$<\/span> dm. Tìm chi\u1ec1u r\u1ed9ng c\u1ee7a b\u1ee9c tranh.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{2}$<\/span> dm","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{7}{3}$<\/span> dm","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{3}$<\/span> dm","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{14}{3}$<\/span> dm"],"correct":"3","level":"2","hint":"","answer":"<p>Chi\u1ec1u r\u1ed9ng c\u1ee7a b\u1ee9c tranh là:<\/p><p><span class=\"math-tex\">$\\dfrac{35}{6} : \\dfrac{7}{2} $<\/span> = <span class=\"math-tex\">$\\dfrac{35}{6} \\times \\dfrac{2}{7} $<\/span> = <span class=\"math-tex\">$\\dfrac{35 \\times 2}{6 \\times 7} $<\/span> = <span class=\"math-tex\">$\\dfrac{70}{42}$<\/span> = <span class=\"math-tex\">$\\dfrac{5}{3}$<\/span> (dm)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{3}$<\/span> dm<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-11 03:53:39","option_type":"math","len":0},{"id":"2601","post_id":"6922","mon_id":"1159012","chapter_id":"1159024","question":"<p>Tìm X, bi\u1ebft: <\/p><p><span class=\"math-tex\">$X \\times \\dfrac{1}{8} = \\dfrac{1}{2}$<\/span><\/p>","options":["<strong>A.<\/strong> X = 1","<strong>B.<\/strong> X = 4","<strong>C.<\/strong> X = 2","<strong>D.<\/strong> X = 8"],"correct":"2","level":"2","hint":"<p>Mu\u1ed1n tìm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft, ta l\u1ea5y tích chia cho th\u1eeba s\u1ed1 \u0111ã bi\u1ebft.<\/p>","answer":"<p><span class=\"math-tex\">$X \\times \\dfrac{1}{8} = \\dfrac{1}{2}$<\/span><\/p><p>X <span class=\"math-tex\">$= \\dfrac{1}{2}:\\dfrac{1}{8} $<\/span><\/p><p>X <span class=\"math-tex\">$= \\dfrac{1}{2}\\times\\dfrac{8}{1} $<\/span><\/p><p>X <span class=\"math-tex\">$= \\dfrac{8}{2}$<\/span><\/p><p>X <span class=\"math-tex\">$=4$<\/span><\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> X = 4<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-11 04:10:49","option_type":"txt","len":0},{"id":"2604","post_id":"6922","mon_id":"1159012","chapter_id":"1159024","question":"<p>Ch\u1ecdn câu <strong>\u0111úng<\/strong>.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4} \\times \\dfrac{3}{5}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{4}{5} \\times \\dfrac{5}{3}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4}: \\dfrac{5}{3}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4} \\times \\dfrac{5}{3}$<\/span>"],"correct":"4","level":"2","hint":"","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4} \\times \\dfrac{3}{5}$<\/span> <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{4}{5} \\times \\dfrac{5}{3}$<\/span> <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4}: \\dfrac{5}{3}$<\/span> <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4} \\times \\dfrac{5}{3}$<\/span> <span style=\"color:#16a085;\">\u0111úng<\/span><\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{5}{4}:\\dfrac{3}{5} = \\dfrac{5}{4} \\times \\dfrac{5}{3}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-02-11 04:14:46","option_type":"math","len":0}]}