Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"5788","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8119","post_id":"5788","mon_id":"1158532","chapter_id":"1158659","question":"<p>N\u1ebfu <span class=\"math-tex\">$\\dfrac{a}{b}=\\dfrac{c}{d}$<\/span> thì<\/p>","options":["<strong>A.<\/strong> a = c","<strong>B.<\/strong> a.d = b.c","<strong>C.<\/strong> b = d","<strong>D.<\/strong> a.c = b.d"],"correct":"2","level":"1","hint":"<p>N\u1ebfu <span class=\"math-tex\">$\\dfrac{a}{b}=\\dfrac{c}{d}$<\/span> thì a.d = b.c<\/p>","answer":"<p>N\u1ebfu <span class=\"math-tex\">$\\dfrac{a}{b}=\\dfrac{c}{d}$<\/span> thì a.d = b.c<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> a.d = b.c<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2022-05-26 02:52:16","option_type":"txt","len":1},{"id":"8122","post_id":"5788","mon_id":"1158532","chapter_id":"1158659","question":"<p>T\u1eeb t\u1ec9 l\u1ec7 th\u1ee9c 2 . 15 = 7,5 . 4 , nh\u1eefng t\u1ec9 l\u1ec7 th\u1ee9c nào sau \u0111ây là \u0111úng?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{7,5}=\\dfrac{4}{15}$<\/span>","<strong>B. <span class=\"math-tex\">$\\dfrac{15}{4}=\\dfrac{7,5}{2}$<\/span><\/strong>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{15}=\\dfrac{7,5}{4}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{15}{4}=\\dfrac{2}{7,5}$<\/span>"],"correct":"[\"1\",\"2\"]","level":"1","hint":"<p>N\u1ebfu a . d = b . c thì ta có các t\u1ec9 l\u1ec7 th\u1ee9c <\/p><p><span class=\"math-tex\">$\\dfrac{a}{b}=\\dfrac{c}{d}$<\/span> ; <span class=\"math-tex\">$\\dfrac{a}{c}=\\dfrac{b}{d}$<\/span> ; <span class=\"math-tex\">$\\dfrac{d}{b}=\\dfrac{c}{a}$<\/span> ; <span class=\"math-tex\">$\\dfrac{d}{c}=\\dfrac{b}{a}$<\/span><\/p>","answer":"<p>T\u1eeb 2 . 15 = 7,5 . 4 ta có các t\u1ec9 l\u1ec7 th\u1ee9c là <\/p><p><span class=\"math-tex\">$\\dfrac{2}{4}=\\dfrac{7,5}{15}$<\/span> ; <span class=\"math-tex\">$\\dfrac{2}{7,5}=\\dfrac{4}{15}$<\/span> ; <span class=\"math-tex\">$\\dfrac{15}{4}=\\dfrac{7,5}{2}$<\/span> ; <span class=\"math-tex\">$\\dfrac{15}{7,5}=\\dfrac{4}{2}$<\/span><\/p><p>Các \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{7,5}=\\dfrac{4}{15}$<\/span> và <strong>B. <span class=\"math-tex\">$\\dfrac{15}{4}=\\dfrac{7,5}{2}$<\/span><\/strong><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"1","date":"2022-05-26 03:03:17","option_type":"math","len":0},{"id":"8124","post_id":"5788","mon_id":"1158532","chapter_id":"1158659","question":"<p>T\u1ec9 s\u1ed1 <span class=\"math-tex\">$\\dfrac{1,3}{3,9}$<\/span> và t\u1ec9 s\u1ed1 nào sau \u0111ây l\u1eadp thành m\u1ed9t t\u1ec9 l\u1ec7 th\u1ee9c?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{3}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{2}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{3}{2}$<\/span>"],"correct":"1","level":"1","hint":"<p>N\u1ebfu <span class=\"math-tex\">$\\dfrac{a}{b}=\\dfrac{c}{d}$<\/span> thì a . d = b . c<\/p>","answer":"<p>Vì 1,3 . 3 = 3,9 . 1 nên <span class=\"math-tex\">$\\dfrac{1,3}{3,9} = \\dfrac{1}{3}$<\/span> .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-26 03:08:54","option_type":"math","len":0}]}