Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"4573","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6678","post_id":"4573","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn câu <strong>\u0111úng:<\/strong><\/p>","options":["<span class=\"frac123\"><span class=\"ts\">9<\/span><span class=\"ms\">11<\/span><\/span> là phân s\u1ed1 âm","<span class=\"frac123\"><span class=\"ts\">-1<\/span><span class=\"ms\">8<\/span><\/span> là phân s\u1ed1 âm","<span class=\"frac123\"><span class=\"ts\">-2<\/span><span class=\"ms\">-3<\/span><\/span> là phân s\u1ed1 âm","<span class=\"frac123\"><span class=\"ts\">2<\/span><span class=\"ms\">-5<\/span><\/span> là phân s\u1ed1 d\u01b0\u01a1ng"],"correct":"2","level":"2","hint":"<p>Phân s\u1ed1 d\u01b0\u01a1ng là phân s\u1ed1 có t\u1eed và m\u1eabu là các s\u1ed1 nguyên cùng d\u1ea5u.<\/p><p>Phân s\u1ed1 âm là phân s\u1ed1 có t\u1eed và m\u1eabu là các s\u1ed1 nguyên khác d\u1ea5u.<\/p>","answer":"<p> <span class=\"math-tex\">$\\dfrac{9}{11} $<\/span> là phân s\u1ed1 âm (<span style=\"color:#c0392b;\">sai <\/span>vì 9 và 11 là hai s\u1ed1 nguyên cùng d\u1ea5u)<\/p><p> <span class=\"math-tex\">$\\dfrac{-1}{8}$<\/span> là phân s\u1ed1 âm (<span style=\"color:#16a085;\">\u0111úng <\/span>vì -1 và 8 là hai s\u1ed1 nguyên khác d\u1ea5u)<\/p><p> <span class=\"math-tex\">$\\dfrac{-2}{-3}$<\/span> là phân s\u1ed1 âm (<span style=\"color:#c0392b;\">sai <\/span>vì -2 và -3 là hai s\u1ed1 nguyên cùng d\u1ea5u)<\/p><p> <span class=\"math-tex\">$\\dfrac{2}{-5}$<\/span> là phân s\u1ed1 d\u01b0\u01a1ng (<span style=\"color:#c0392b;\">sai <\/span>vì 2 và -5 là hai s\u1ed1 nguyên khác d\u1ea5u)<\/p><p>\u0110áp án c\u1ea7n ch\u1ecdn là <span style=\"color:#16a085;\"> <span class=\"math-tex\">$\\dfrac{-1}{8}$<\/span> là phân s\u1ed1 âm<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-08-27 03:01:31","option_type":"math","len":0},{"id":"6680","post_id":"4573","mon_id":"1158113","chapter_id":"1158119","question":"<p>Cho các phép so sánh sau:<\/p><p><strong>A.<\/strong> <span class=\"frac123\"><span class=\"ts\">1<\/span><span class=\"ms\">3<\/span><\/span> < 1 <strong>B.<\/strong> <span class=\"frac123\"><span class=\"ts\">3<\/span><span class=\"ms\">4<\/span><\/span> > 1 <strong>C. <\/strong> <span class=\"frac123\"><span class=\"ts\">8<\/span><span class=\"ms\">-5<\/span><\/span> >1 <strong>D. <\/strong> <span class=\"frac123\"><span class=\"ts\">-9<\/span><span class=\"ms\">-2<\/span><\/span> > 1<\/p><p>S\u1ed1 các phép so sánh \u0111úng là <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"2\"]"],"level":"2","hint":"<p>\u0110\u01b0a phân s\u1ed1 v\u1ec1 phân s\u1ed1 b\u1eb1ng nó và có m\u1eabu d\u01b0\u01a1ng r\u1ed3i so sánh t\u1eed v\u1edbi m\u1eabu c\u1ee7a phân s\u1ed1 m\u1edbi, n\u1ebfu t\u1eed l\u1edbn h\u01a1n m\u1eabu thì phân s\u1ed1 ban \u0111\u1ea7u l\u1edbn h\u01a1n 1.<\/p>","answer":"<p><strong><span style=\"color:#16a085;\">A.<\/span><\/strong> <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{1}{3}<1$<\/span><\/span> (<span style=\"color:#16a085;\">\u0111úng<\/span> vì 1 < 3)<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{3}{4}>1$<\/span> (<span style=\"color:#c0392b;\">sai<\/span> vì 3 < 4)<\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{8}{-5}>1$<\/span> (<span style=\"color:#c0392b;\">sai<\/span> vì <span class=\"math-tex\">$\\dfrac{8}{-5}=\\dfrac{-8}{5}$<\/span> và -8 < 5)<\/p><p><strong><span style=\"color:#16a085;\">D.<\/span><\/strong> <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{-9}{-2}>1$<\/span><\/span> (<span style=\"color:#16a085;\">\u0111úng<\/span> vì <span class=\"math-tex\">$\\dfrac{-9}{-2}=\\dfrac{9}{2}$<\/span> và 9 > 2)<\/p><p>V\u1eady có<span style=\"color:#16a085;\"> <strong>2<\/strong> <\/span>phép so sánh \u0111úng.<\/p><p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><strong>2<\/strong><\/span> .<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"3","date":"2021-08-27 03:15:23"},{"id":"6683","post_id":"4573","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm x, bi\u1ebft <\/p><p><span class=\"frac123\"><span class=\"ts\">5<\/span><span class=\"ms\">9<\/span><\/span><span class=\"operator\">:<\/span><span class=\"blank_inp\">x<\/span><span class=\"operator\">-<\/span><span class=\"frac123\"><span class=\"ts\">3<\/span><span class=\"ms\">5<\/span><\/span><span class=\"operator\">= <\/span><span class=\"frac123\"><span class=\"ts\">7<\/span><span class=\"ms\">15<\/span><\/span><\/p>","options":["<span class=\"math-tex\">$x = \\dfrac{16}{27}$<\/span>","<span class=\"math-tex\">$x = \\dfrac{27}{16}$<\/span>","<span class=\"math-tex\">$x =\\dfrac{25}{48}$<\/span>"],"correct":"3","level":"2","hint":"<p>Mu\u1ed1n tìm s\u1ed1 b\u1ecb tr\u1eeb ta l\u1ea5y hi\u1ec7u c\u1ed9ng v\u1edbi s\u1ed1 tr\u1eeb.<\/p><p>Mu\u1ed1n tìm s\u1ed1 chia ta l\u1ea5y s\u1ed1 b\u1ecb chia chia cho th\u01b0\u01a1ng.<\/p>","answer":"<p><span class=\"math-tex\">$\\dfrac{5}{9}:x-\\dfrac{3}{5}=\\dfrac{7}{15}$<\/span> (tìm s\u1ed1 b\u1ecb tr\u1eeb)<\/p><p><span class=\"math-tex\">$\\dfrac{5}{9}:x=\\dfrac{7}{15}+\\dfrac{3}{5}$<\/span><\/p><p><span class=\"math-tex\">$\\dfrac{5}{9}:x=\\dfrac{7}{15}+\\dfrac{9}{15}$<\/span><\/p><p><span class=\"math-tex\">$\\dfrac{5}{9}:x=\\dfrac{16}{15}$<\/span> (tìm s\u1ed1 chia)<\/p><p><span class=\"math-tex\">$x=\\dfrac{5}{9}:\\dfrac{16}{15}$<\/span><\/p><p><span class=\"math-tex\">$x =\\dfrac{5}{9}.\\dfrac{15}{16}$<\/span><\/p><p><span class=\"math-tex\">$x = \\dfrac{5}{3}.\\dfrac{5}{16}$<\/span><\/p><p><span style=\"color:#16a085;\"><span class=\"math-tex\">$x =\\dfrac{25}{48}$<\/span><\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><span class=\"math-tex\">$x =\\dfrac{25}{48}$<\/span> .<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-08-27 03:23:31","option_type":"math","len":0}]}