{"save":1,"level":1,"time":"15","total":10,"point":5,"segment":[{"id":"2142","test_id":"372","question":"<p>T&iacute;nh \u0111\u1ed9 d&agrave;i \u0111o\u1ea1n th\u1eb3ng AB, bi\u1ebft A l&agrave; trung \u0111i\u1ec3m c\u1ee7a BC v&agrave; BC = 19,5 dm.<\/p>","options":["AB = 9,75 dm","AB = 9,55 dm","AB = 39 dm"],"correct":"1","answer":"<p>V&igrave; A l&agrave; trung \u0111i\u1ec3m c\u1ee7a BC v&agrave; BC = 19,5 dm n&ecirc;n AB =&nbsp;<span class=\"math-tex\">$\\dfrac{BC}{2}$<\/span>&nbsp;=&nbsp;<span class=\"math-tex\">$\\dfrac{19,5}{2}$<\/span>&nbsp;= 9,75 (dm)<\/p><p>V\u1eady \u0111&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <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>T&igrave;m x, bi\u1ebft:&nbsp;<\/p><p>1,2 . 3 - 0,8&nbsp;.&nbsp;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&nbsp;.&nbsp;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>&nbsp; &nbsp; &nbsp; &nbsp; 0,8 . x = 3,6 - 10<\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; 0,8 . x = -6,4<\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x = -6,4 : 0,8<\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x = -8<\/p><p>V\u1eady \u0111&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <span style=\"color:#16a085;\"><strong>x = -8<\/strong><\/span>.<\/p>","type":"choose","user_id":"131","test":"2","date":"2021-09-26 10:43:41"}]}