{"common":{"save":0,"post_id":"4782","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8066","post_id":"4782","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh<\/p><p>M =&nbsp;<span class=\"math-tex\">$\\left( \\dfrac{1}{2}-\\dfrac{1}{3} \\right).\\dfrac{18}{7}$<\/span><\/p>","options":["M = <span class=\"math-tex\">$\\dfrac{3}{14}$<\/span>","M = <span class=\"math-tex\">$\\dfrac{3}{2}$<\/span>","M = <span class=\"math-tex\">$\\dfrac{3}{7}$<\/span>"],"correct":"3","level":"2","hint":"<p>Ch&uacute; &yacute; th\u1ee9 t\u1ef1 th\u1ef1c hi\u1ec7n ph&eacute;p t&iacute;nh: trong ngo\u1eb7c r\u1ed3i \u0111\u1ebfn nh&acirc;n chia r\u1ed3i \u0111\u1ebfn c\u1ed9ng tr\u1eeb<\/p>","answer":"<p>M =&nbsp;<span class=\"math-tex\">$\\left( \\dfrac{1}{2}-\\dfrac{1}{3} \\right).\\dfrac{18}{7}$<\/span><\/p><p>M =&nbsp;<span class=\"math-tex\">$\\left( \\dfrac{3}{6}-\\dfrac{2}{6} \\right).\\dfrac{18}{7}$<\/span><\/p><p>M =&nbsp;<span class=\"math-tex\">$\\dfrac{1}{6}.\\dfrac{18}{7}$<\/span><\/p><p>M =&nbsp;<span class=\"math-tex\">$\\dfrac{3}{7}$<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\">M =&nbsp;<span class=\"math-tex\">$\\dfrac{3}{7}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-10-02 14:14:48","option_type":"math","len":0},{"id":"8068","post_id":"4782","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh<\/p><p><span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{8}{3}-\\dfrac{5}{12}.\\dfrac{11}{3}+\\dfrac{5}{12}.\\dfrac{1}{4}$<\/span><\/p>","options":["<span class=\"math-tex\">$\\dfrac{-5}{16}$<\/span>","<span class=\"math-tex\">$\\dfrac{5}{16}$<\/span>","<span class=\"math-tex\">$\\dfrac{3}{16}$<\/span>","<span class=\"math-tex\">$\\dfrac{-3}{16}$<\/span>"],"correct":"1","level":"2","hint":"<p>D&ugrave;ng t&iacute;nh ch\u1ea5t ph&acirc;n ph\u1ed1i c\u1ee7a ph&eacute;p nh&acirc;n v\u1edbi ph&eacute;p c\u1ed9ng \u0111\u1ec3 nh&oacute;m c&aacute;c ph&acirc;n s\u1ed1 m\u1ed9t c&aacute;ch th&iacute;ch h\u1ee3p.<\/p>","answer":"<p>&nbsp;&nbsp;<span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{8}{3}-\\dfrac{5}{12}.\\dfrac{11}{3}+\\dfrac{5}{12}.\\dfrac{1}{4}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{5}{12}.\\left( \\dfrac{8}{3}-\\dfrac{11}{3}+\\dfrac{1}{4} \\right)$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{5}{12}.\\left( \\dfrac{32}{12}-\\dfrac{44}{12}+\\dfrac{3}{12} \\right)$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{-9}{12}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{-3}{4}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{-5}{16}$<\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{-5}{16}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-02 14:22:46","option_type":"math","len":0},{"id":"8070","post_id":"4782","mon_id":"1158113","chapter_id":"1158119","question":"<p>So s&aacute;nh x v\u1edbi 1 bi\u1ebft<\/p><p>x .&nbsp;<span class=\"math-tex\">$\\dfrac{7}{16}$<\/span>&nbsp;+&nbsp;<span class=\"math-tex\">$\\dfrac{3}{8}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{9}{4}$<\/span><\/p>","options":["x &gt; 1","x &lt; 1","x = 1","Kh&ocirc;ng so s&aacute;nh \u0111\u01b0\u1ee3c"],"correct":"1","level":"2","hint":"<p>T&igrave;m x r\u1ed3i so s&aacute;nh x v\u1edbi 1.<\/p>","answer":"<p>x .&nbsp;<span class=\"math-tex\">$\\dfrac{7}{16}$<\/span>&nbsp;+&nbsp;<span class=\"math-tex\">$\\dfrac{3}{8}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{9}{4}$<\/span><\/p><p>x .&nbsp;<span class=\"math-tex\">$\\dfrac{7}{16}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{9}{4}-\\dfrac{3}{8}$<\/span><\/p><p>x .&nbsp;<span class=\"math-tex\">$\\dfrac{7}{16}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{18}{8}-\\dfrac{3}{8}$<\/span><\/p><p>x .&nbsp;<span class=\"math-tex\">$\\dfrac{7}{16}=\\dfrac{15}{8}$<\/span><\/p><p>x =&nbsp;<span class=\"math-tex\">$\\dfrac{15}{8}:\\dfrac{7}{16}$<\/span><\/p><p>x =&nbsp;<span class=\"math-tex\">$\\dfrac{15}{8}.\\dfrac{16}{7}$<\/span><\/p><p>x =&nbsp;<span class=\"math-tex\">$\\dfrac{15.2}{7}$<\/span><\/p><p>x =&nbsp;<span class=\"math-tex\">$\\dfrac{30}{7}$<\/span>&nbsp; &gt; 1&nbsp; (v&igrave; 30 &gt; 7)<\/p><p>V\u1eady x &gt; 1<\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;<span style=\"color:#16a085;\"><strong> x &gt; 1<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-02 14:30:07","option_type":"txt","len":2}]}