{"common":{"save":0,"post_id":"6450","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6658","mon_id":"1158767","chapter_id":"1158885","post_id":"6450","question":"<p>Cho giá tr\u1ecb g\u1ea7n \u0111úng c\u1ee7a <span class=\"math-tex\">$\\dfrac{3}{7}$<\/span> là 0,429. Sai s\u1ed1 tuy\u1ec7t \u0111\u1ed1i c\u1ee7a s\u1ed1 0,429 v\u1edbi \u0111\u1ed9 chính xác là:<\/p>","options":["<strong>A. <\/strong>0,0001","<strong>B.<\/strong> 0,0002","<strong>C.<\/strong> 0,0004","<strong>D.<\/strong> 0,0005"],"correct":"4","level":"1","hint":"","answer":"<p>Ta có <span class=\"math-tex\">$\\dfrac{3}{7}=0,428571...$<\/span> nên sai s\u1ed1 tuy\u1ec7t \u0111\u1ed1i c\u1ee7a 0,429 v\u1edbi \u0111\u1ed9 chính xác là:<\/p><p><span class=\"math-tex\">$\\Delta=\\bigg|0,429-\\dfrac{3}{7}\\bigg|<\\bigg|0,429-0,4285\\bigg|=0,0005$<\/span><\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 0,0005<\/span><\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2023-05-28 03:09:58","option_type":"txt","len":0},{"id":"6660","mon_id":"1158767","chapter_id":"1158885","post_id":"6450","question":"<p>N\u1ebfu l\u1ea5y 3,14 làm giá tr\u1ecb g\u1ea7n \u0111úng c\u1ee7a <span class=\"math-tex\">$\\pi$<\/span> thì sai s\u1ed1 là: <\/p>","options":["<strong>A. <\/strong>0,001","<strong>B.<\/strong> 0,002","<strong>C.<\/strong> 0,004","<strong>D.<\/strong> 0,003"],"correct":"1","level":"1","hint":"","answer":"<p>Ta có <span class=\"math-tex\">$\\pi$<\/span> = 3,141592654... nên sai s\u1ed1 tuy\u1ec7t \u0111\u1ed1i c\u1ee7a 3,14 là:<\/p><p><span class=\"math-tex\">$\\Delta=\\bigg|3,14-\\pi\\bigg|<\\bigg|3,14-3,141\\bigg|=0,001$<\/span>.<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A. <\/strong>0,001<\/span><\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2023-05-28 03:13:41","option_type":"txt","len":0},{"id":"6661","mon_id":"1158767","chapter_id":"1158885","post_id":"6450","question":"<p>Trái \u0111\u1ea5t quay m\u1ed9t vòng quanh m\u1eb7t tr\u1eddi là 365 ngày. K\u1ebft qu\u1ea3 này có \u0111\u1ed9 chính xác là <span class=\"math-tex\">$\\dfrac{1}{4}$<\/span> ngày. Sai s\u1ed1 tuy\u1ec7t \u0111\u1ed1i là:<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\dfrac{1}{4}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{365}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{1460}$<\/span>","<strong>D.<\/strong> \u0110áp án khác"],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A. <\/strong><span class=\"math-tex\">$\\dfrac{1}{4}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-28 03:16:00","option_type":"math","len":0}]}
