Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"4775","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7985","post_id":"4775","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm x bi\u1ebft<\/p><p>x - <span class=\"math-tex\">$\\dfrac{7}{12}$<\/span> = <span class=\"math-tex\">$\\dfrac{11}{18}$<\/span><\/p>","options":["x = <span class=\"math-tex\">$\\dfrac{43}{36}$<\/span>","x = <span class=\"math-tex\">$\\dfrac{-43}{36}$<\/span>","x = <span class=\"math-tex\">$\\dfrac{1}{36}$<\/span>"],"correct":"1","level":"2","hint":"<p>Tìm s\u1ed1 b\u1ecb tr\u1eeb = hi\u1ec7u + s\u1ed1 tr\u1eeb<\/p><p>Chú ý các quy t\u1eafc c\u1ed9ng tr\u1eeb phân s\u1ed1 khác m\u1eabu và cùng m\u1eabu.<\/p>","answer":"<p>x - <span class=\"math-tex\">$\\dfrac{7}{12}$<\/span> = <span class=\"math-tex\">$\\dfrac{11}{18}$<\/span> <\/p><p>x = <span class=\"math-tex\">$\\dfrac{11}{18}$<\/span> + <span class=\"math-tex\">$\\dfrac{7}{12}$<\/span> (m\u1eabu chung là 36)<\/p><p>x = <span class=\"math-tex\">$\\dfrac{22}{36}+\\dfrac{21}{36}$<\/span><\/p><p>x = <span class=\"math-tex\">$\\dfrac{43}{36}$<\/span><\/p><p>V\u1eady x = <span class=\"math-tex\">$\\dfrac{43}{36}$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> x = <span class=\"math-tex\">$\\dfrac{43}{36}$<\/span><\/strong><\/span><\/p><p><strong> <\/strong><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-01 23:25:55","option_type":"math","len":0},{"id":"7987","post_id":"4775","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm x bi\u1ebft<\/p><p><span class=\"math-tex\">$\\dfrac{3}{2}$<\/span> - x = <span class=\"math-tex\">$\\dfrac{5}{8}$<\/span><\/p>","options":["x = <span class=\"math-tex\">$\\dfrac{7}{8}$<\/span>","x = <span class=\"math-tex\">$\\dfrac{-7}{8}$<\/span>","x = <span class=\"math-tex\">$\\dfrac{17}{8}$<\/span>"],"correct":"1","level":"2","hint":"<p>Tìm s\u1ed1 tr\u1eeb = s\u1ed1 b\u1ecb tr\u1eeb - hi\u1ec7u<\/p>","answer":"<p><span class=\"math-tex\">$\\dfrac{3}{2}$<\/span> - x = <span class=\"math-tex\">$\\dfrac{5}{8}$<\/span><\/p><p> x = <span class=\"math-tex\">$\\dfrac{3}{2}-\\dfrac{5}{8}$<\/span> (m\u1eabu chung là 8)<\/p><p> x = <span class=\"math-tex\">$\\dfrac{12}{8}-\\dfrac{5}{8}$<\/span><\/p><p> x = <span class=\"math-tex\">$\\dfrac{7}{8}$<\/span><\/p><p>V\u1eady x = <span class=\"math-tex\">$\\dfrac{7}{8}$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> x =<\/strong> <span class=\"math-tex\">$\\dfrac{7}{8}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-10-01 23:28:37","option_type":"math","len":0},{"id":"7989","post_id":"4775","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn phép tính cho k\u1ebft qu\u1ea3 <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{8}-\\dfrac{15}{16}+\\dfrac{19}{24}=\\dfrac{-95}{48}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{58}{23}-\\dfrac{37}{46}-\\dfrac{5}{23}=\\dfrac{3}{2}$<\/span>"],"correct":"2","level":"2","hint":"<p>Mu\u1ed1n c\u1ed9ng hay tr\u1eeb nhi\u1ec1u phân s\u1ed1 không cùng m\u1eabu, ta quy \u0111\u1ed3ng m\u1eabu s\u1ed1 các phân s\u1ed1 r\u1ed3i c\u1ed9ng hay tr\u1eeb các t\u1eed và gi\u1eef nguyên m\u1eabu c\u1ee7a các phân s\u1ed1 v\u1eeba tìm \u0111\u01b0\u1ee3c.<\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{17}{8}-\\dfrac{15}{16}+\\dfrac{19}{24}=\\dfrac{-95}{48}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span><br \/>vì <span class=\"math-tex\">$\\dfrac{17}{8}-\\dfrac{15}{16}+\\dfrac{19}{24}=\\dfrac{102}{48}-\\dfrac{45}{48}+\\dfrac{38}{48}=\\dfrac{102-45+38}{95}=\\dfrac{95}{48}$<\/span>)<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{58}{23}-\\dfrac{37}{46}-\\dfrac{5}{23}=\\dfrac{3}{2}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span><br \/>vì <span class=\"math-tex\">$\\dfrac{58}{23}-\\dfrac{37}{46}-\\dfrac{5}{23}=\\dfrac{116}{46}-\\dfrac{37}{46}-\\dfrac{10}{46}=\\dfrac{116-37-10}{46}=\\dfrac{69}{46}=\\dfrac{3}{2}$<\/span>) <\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{58}{23}-\\dfrac{37}{46}-\\dfrac{5}{23}=\\dfrac{3}{2}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-01 23:38:43","option_type":"math","len":0}]}