{"save":1,"level":1,"time":"15","total":10,"point":5,"segment":[{"id":"2142","test_id":"372","question":"<p>Tính \u0111\u1ed9 dài \u0111o\u1ea1n th\u1eb3ng AB, bi\u1ebft A là trung \u0111i\u1ec3m c\u1ee7a BC và BC = 19,5 dm.<\/p>","options":["AB = 9,75 dm","AB = 9,55 dm","AB = 39 dm"],"correct":"1","answer":"<p>Vì A là trung \u0111i\u1ec3m c\u1ee7a BC và BC = 19,5 dm nên AB = <span class=\"math-tex\">$\\dfrac{BC}{2}$<\/span> = <span class=\"math-tex\">$\\dfrac{19,5}{2}$<\/span> = 9,75 (dm)<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>AB = 9,75 dm<\/strong><\/span>.<\/p>","type":"choose","user_id":"131","test":"2","date":"2021-09-26 04:05:10"},{"id":"2143","test_id":"372","question":"<p>Tìm x, bi\u1ebft: <\/p><p>1,2 . 3 - 0,8 . x = -3,4 . 2 + 2,8 . 6<\/p>","options":["x = 8","x = -8","x = -0,8"],"correct":"2","answer":"<p>1,2 . 3 - 0,8 . x = -3,4 . 2 + 2,8 . 6<\/p><p>3,6 - 0,8 . x = -6,8 + 16,8<\/p><p>3,6 - 0,8 . x = 10<\/p><p> 0,8 . x = 3,6 - 10<\/p><p> 0,8 . x = -6,4<\/p><p> x = -6,4 : 0,8<\/p><p> x = -8<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>x = -8<\/strong><\/span>.<\/p>","type":"choose","user_id":"131","test":"2","date":"2021-09-26 10:43:41"}]}