{"common":{"save":0,"post_id":"4796","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8173","post_id":"4796","mon_id":"1158113","chapter_id":"1158126","question":"<p>Phân s\u1ed1 nào sau \u0111ây là phân s\u1ed1 th\u1eadp phân?<\/p>","options":["<span class=\"math-tex\">$\\dfrac{9}{20}$<\/span>","<span class=\"math-tex\">$\\dfrac{-38}{100}$<\/span>","<span class=\"math-tex\">$\\dfrac{6}{12}$<\/span>","<span class=\"math-tex\">$\\dfrac{-785}{50}$<\/span>"],"correct":"2","level":"1","hint":"<p>Phân s\u1ed1 th\u1eadp phân là phân s\u1ed1 có <strong>m\u1eabu là l\u0169y th\u1eeba c\u1ee7a 10<\/strong>.<\/p>","answer":"<p>Phân s\u1ed1 th\u1eadp phân là phân s\u1ed1 có <strong>m\u1eabu là l\u0169y th\u1eeba c\u1ee7a 10<\/strong>. T\u1ee9c là m\u1eabu là các s\u1ed1 nh\u01b0 <strong>10, 100, 1000<\/strong>, ...<\/p><p>Do \u0111ó phân s\u1ed1 th\u1eadp phân là <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{-38}{100}$<\/span><\/span><\/p><p>(các phân s\u1ed1 còn l\u1ea1i không có m\u1eabu l\u0169y th\u1eeba c\u1ee7a 10 nh\u01b0 10, 100, 1000, ...)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{-38}{100}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-03 13:18:15","option_type":"math","len":0},{"id":"8175","post_id":"4796","mon_id":"1158113","chapter_id":"1158126","question":"<p>Vi\u1ebft phân s\u1ed1 th\u1eadp phân sau d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp phân.<\/p><p> <span class=\"frac123\"><span class=\"ts\">-87<\/span><span class=\"ms\">100<\/span><\/span> = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"-0,87\"]"],"level":"1","hint":"<p>M\u1eabu c\u1ee7a phân s\u1ed1 th\u1eadp phân có bao nhiêu ch\u1eef s\u1ed1 0 thì ph\u1ea7n th\u1eadp phân có b\u1ea5y nhiêu ch\u1eef s\u1ed1.<\/p>","answer":"<p>M\u1eabu c\u1ee7a phân s\u1ed1 th\u1eadp phân có bao nhiêu ch\u1eef s\u1ed1 0 thì ph\u1ea7n th\u1eadp phân có b\u1ea5y nhiêu ch\u1eef s\u1ed1.<\/p><p>Ví d\u1ee5: <span class=\"math-tex\">$\\dfrac{9}{10}$<\/span> = 0,9 ; <span class=\"math-tex\">$\\dfrac{-558}{100}$<\/span> = −5,58 ; <span class=\"math-tex\">$\\dfrac{-5}{1000}$<\/span> = −0,005 ; ...<\/p><p>Ta có: <span class=\"math-tex\">$\\dfrac{-87}{100}$<\/span> = -0,87 (vì m\u1eabu có <b>hai <\/b>ch\u1eef s\u1ed1 0)<\/p><p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"> <strong>-0,87 <\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-10-03 13:21:59"},{"id":"8178","post_id":"4796","mon_id":"1158113","chapter_id":"1158126","question":"<p>\u0110\u1ed5i <span class=\"math-tex\">$\\dfrac{-6785}{10}$<\/span> sang s\u1ed1 th\u1eadp phân<\/p>","options":["-6,785","-67,85","-678,5"],"correct":"3","level":"1","hint":"<p>M\u1eabu c\u1ee7a phân s\u1ed1 th\u1eadp phân có bao nhiêu ch\u1eef s\u1ed1 0 thì ph\u1ea7n th\u1eadp phân có b\u1ea5y nhiêu ch\u1eef s\u1ed1.<\/p>","answer":"<p>Ta có: <span class=\"math-tex\">$\\dfrac{-6785}{10}$<\/span> = -678,5 (vì m\u1eabu có m\u1ed9t ch\u1eef s\u1ed1 0)<\/p><p>\u0110áp án \u0111úng là <strong><span style=\"color:#16a085;\">-678,5<\/span><\/strong><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"1","date":"2021-10-03 13:55:15","option_type":"txt","len":0}]}