{"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>Tính<\/p><p>M = <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>Chú ý th\u1ee9 t\u1ef1 th\u1ef1c hi\u1ec7n phép tính: trong ngo\u1eb7c r\u1ed3i \u0111\u1ebfn nhân chia r\u1ed3i \u0111\u1ebfn c\u1ed9ng tr\u1eeb<\/p>","answer":"<p>M = <span class=\"math-tex\">$\\left( \\dfrac{1}{2}-\\dfrac{1}{3} \\right).\\dfrac{18}{7}$<\/span><\/p><p>M = <span class=\"math-tex\">$\\left( \\dfrac{3}{6}-\\dfrac{2}{6} \\right).\\dfrac{18}{7}$<\/span><\/p><p>M = <span class=\"math-tex\">$\\dfrac{1}{6}.\\dfrac{18}{7}$<\/span><\/p><p>M = <span class=\"math-tex\">$\\dfrac{3}{7}$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\">M = <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>Tính<\/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>Dùng tính ch\u1ea5t phân ph\u1ed1i c\u1ee7a phép nhân v\u1edbi phép c\u1ed9ng \u0111\u1ec3 nhóm các phân s\u1ed1 m\u1ed9t cách thích h\u1ee3p.<\/p>","answer":"<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><p>= <span class=\"math-tex\">$\\dfrac{5}{12}.\\left( \\dfrac{8}{3}-\\dfrac{11}{3}+\\dfrac{1}{4} \\right)$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{5}{12}.\\left( \\dfrac{32}{12}-\\dfrac{44}{12}+\\dfrac{3}{12} \\right)$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{-9}{12}$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{5}{12}.\\dfrac{-3}{4}$<\/span><\/p><p>= <span class=\"math-tex\">$\\dfrac{-5}{16}$<\/span><\/p><p>\u0110áp án \u0111úng là <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 sánh x v\u1edbi 1 bi\u1ebft<\/p><p>x . <span class=\"math-tex\">$\\dfrac{7}{16}$<\/span> + <span class=\"math-tex\">$\\dfrac{3}{8}$<\/span> = <span class=\"math-tex\">$\\dfrac{9}{4}$<\/span><\/p>","options":["x > 1","x < 1","x = 1","Không so sánh \u0111\u01b0\u1ee3c"],"correct":"1","level":"2","hint":"<p>Tìm x r\u1ed3i so sánh x v\u1edbi 1.<\/p>","answer":"<p>x . <span class=\"math-tex\">$\\dfrac{7}{16}$<\/span> + <span class=\"math-tex\">$\\dfrac{3}{8}$<\/span> = <span class=\"math-tex\">$\\dfrac{9}{4}$<\/span><\/p><p>x . <span class=\"math-tex\">$\\dfrac{7}{16}$<\/span> = <span class=\"math-tex\">$\\dfrac{9}{4}-\\dfrac{3}{8}$<\/span><\/p><p>x . <span class=\"math-tex\">$\\dfrac{7}{16}$<\/span> = <span class=\"math-tex\">$\\dfrac{18}{8}-\\dfrac{3}{8}$<\/span><\/p><p>x . <span class=\"math-tex\">$\\dfrac{7}{16}=\\dfrac{15}{8}$<\/span><\/p><p>x = <span class=\"math-tex\">$\\dfrac{15}{8}:\\dfrac{7}{16}$<\/span><\/p><p>x = <span class=\"math-tex\">$\\dfrac{15}{8}.\\dfrac{16}{7}$<\/span><\/p><p>x = <span class=\"math-tex\">$\\dfrac{15.2}{7}$<\/span><\/p><p>x = <span class=\"math-tex\">$\\dfrac{30}{7}$<\/span> > 1 (vì 30 > 7)<\/p><p>V\u1eady x > 1<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> x > 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}]}