Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"4469","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6111","post_id":"4469","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tính b\u1eb1ng cách h\u1ee3p lí và \u0111i\u1ec1n k\u1ebft qu\u1ea3 vào ô tr\u1ed1ng<\/p><p><span class=\"math-tex\">$\u200b\u200b\u200b\u200b\\dfrac{-1}{18} + \u200b\u200b\\dfrac{7}{6} +\u200b\u200b\\dfrac{-17}{18} + \u200b\u200b\\dfrac{5}{6}$<\/span> = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"1\"]"],"level":"2","hint":"<p>Nhóm các phân s\u1ed1 có cùng m\u1eabu v\u1edbi nhau r\u1ed3i th\u1ef1c hiên phép c\u1ed9ng.<\/p>","answer":"<p> <span class=\"math-tex\">$\u200b\u200b\u200b\u200b\\dfrac{-1}{18} + \u200b\u200b\\dfrac{7}{6} +\u200b\u200b\\dfrac{-17}{18} + \u200b\u200b\\dfrac{5}{6}$<\/span><\/p><p>=<span class=\"math-tex\">$\u200b\u200b\u200b\u200b\\dfrac{-1}{18} + \u200b\u200b\\dfrac{-17}{18} +\u200b\u200b\\dfrac{7}{6} + \u200b\u200b\\dfrac{5}{6}$<\/span><\/p><p>=<span class=\"math-tex\">$\u200b\u200b\u200b\u200b\\dfrac{(-1)+(-17)}{18} + \u200b\u200b\\dfrac{7+5}{6} $<\/span><\/p><p>= <span class=\"math-tex\">$\u200b\u200b\u200b\u200b\\dfrac{-18}{18} + \u200b\u200b\\dfrac{12}{6} $<\/span><\/p><p>= <span class=\"math-tex\">$-1 + 2$<\/span><\/p><p>= <strong><span style=\"color:#16a085;\">1<\/span><\/strong><\/p><p>\u0110áp án c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><strong>1<\/strong><\/span>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"3","date":"2021-08-21 03:18:02"},{"id":"6112","post_id":"4469","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm x, bi\u1ebft<\/p><p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{18}{19} - \u200b\u200b\\dfrac{21}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$x= \u200b\u200b\\dfrac{-5}{38}$<\/span>","<strong>B<\/strong>. <span class=\"math-tex\">$x = \u200b\u200b\\dfrac{5}{38}$<\/span>","<strong>C<\/strong>. <span class=\"math-tex\">$x = \u200b\u200b\\dfrac{25}{38}$<\/span>","<strong>D<\/strong>. <span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-25}{38}$<\/span>"],"correct":"1","level":"2","hint":"<p>Làm phép tính tr\u1eeb \u0111\u1ec3 tính s\u1ed1 h\u1ea1ng \u0111ã bi\u1ebft \u1edf bên trái d\u1ea5u b\u1eb1ng<\/p><p>Mu\u1ed1n tìm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111ã bi\u1ebft<\/p>","answer":"<p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{18}{19} - \u200b\u200b\\dfrac{21}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p><p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{18.2}{19.2} - \u200b\u200b\\dfrac{21}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p><p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{36}{38} - \u200b\u200b\\dfrac{21}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p><p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{36-21}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p><p><span class=\"math-tex\">$x + \u200b\u200b\u200b\u200b\\dfrac{15}{38} = \u200b\u200b\\dfrac{5}{19}$<\/span><\/p><p><span class=\"math-tex\">$x = \u200b\u200b\u200b\u200b\\dfrac{5}{19} - \u200b\u200b\\dfrac{15}{38}$<\/span><\/p><p><span class=\"math-tex\">$x = \u200b\u200b\u200b\u200b\\dfrac{10}{38} - \u200b\u200b\\dfrac{15}{38}$<\/span><\/p><p><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{10-15}{38}$<\/span><\/p><p><span style=\"color:#16a085;\"><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-5}{38}$<\/span><\/span><\/p><p>\u0110áp án là <span style=\"color:#16a085;\"><strong>A<\/strong><\/span>.<span style=\"color:#16a085;\"><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-5}{38}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-08-21 03:32:04","option_type":"math","len":0},{"id":"6114","post_id":"4469","mon_id":"1158113","chapter_id":"1158119","question":"<p>Tìm x, bi\u1ebft<\/p><p><span class=\"math-tex\">$x - \u200b\u200b\\dfrac{15}{7} = \u200b\u200b\\dfrac{-11}{6}$<\/span><\/p><div class=\"lt123_imgs\"><img class=\"img_dd tiny\" src=\"\/data\/library\/do-vat\/ba-kien-hang.png\" \/><\/div>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-13}{42}$<\/span>","<strong>B<\/strong>. <span class=\"math-tex\">$x = \u200b\u200b\\dfrac{13}{42}$<\/span>"],"correct":"2","level":"2","hint":"<p>Thu g\u1ecdn v\u1ebf trái tr\u01b0\u1edbc r\u1ed3i tìm x.<\/p>","answer":"<p><span class=\"math-tex\">$x - \u200b\u200b\\dfrac{15}{7} = \u200b\u200b\\dfrac{-11}{6}$<\/span><\/p><p><span class=\"math-tex\">$x= \u200b\u200b\\dfrac{-11}{6} + \u200b\u200b\\dfrac{15}{7} $<\/span><\/p><p><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-11.7}{6.7} + \u200b\u200b\\dfrac{15.6}{7.6}$<\/span><\/p><p><span class=\"math-tex\">$x =\u200b\u200b\\dfrac{-77}{42}+\u200b\u200b\\dfrac{90}{42}$<\/span><\/p><p><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{-77+90}{42}$<\/span><\/p><p><span style=\"color:#16a085;\"><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{13}{42}$<\/span><\/span><\/p><p>\u0110áp án \u0111úng là <strong><span style=\"color:#16a085;\">B<\/span><\/strong>. <span style=\"color:#16a085;\"><span class=\"math-tex\">$x = \u200b\u200b\\dfrac{13}{42}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-08-21 03:49:33","option_type":"math","len":0}]}