{"common":{"save":0,"post_id":"6443","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6619","mon_id":"1158767","chapter_id":"1158885","post_id":"6443","question":"<p>Tìm s\u1ed1 g\u1ea7n \u0111úng c\u1ee7a a = 2851275 v\u1edbi \u0111\u1ed9 chính xác d = 300.<\/p>","options":["<strong>A.<\/strong> 2851000.","<strong>B.<\/strong> 2851575.","<strong>C.<\/strong> 2850025.","<strong>D.<\/strong> 285120."],"correct":"1","level":"3","hint":"","answer":"<p>Vì \u0111\u1ed9 chính xác \u0111\u1ebfn hàng tr\u0103m nên ta quy tròn a \u0111\u1ebfn hàng nghìn, v\u1eady s\u1ed1 quy tròn c\u1ee7a a là 2851000.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> 2851000.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-27 03:54:53","option_type":"txt","len":1},{"id":"6620","mon_id":"1158767","chapter_id":"1158885","post_id":"6443","question":"<p>S\u1eed d\u1ee5ng máy tính b\u1ecf túi, hãy vi\u1ebft giá tr\u1ecb g\u1ea7n \u0111úng c\u1ee7a <span class=\"math-tex\">$\\sqrt{3}$<\/span> chính xác \u0111\u1ebfn hàng ph\u1ea7n tr\u0103m<\/p>","options":["<strong>A.<\/strong> 1,73","<strong>B.<\/strong> 1,732","<strong>C. <\/strong>1,7","<strong>D.<\/strong> 1,7320"],"correct":"1","level":"3","hint":"","answer":"<p>S\u1eed d\u1ee5ng máy tính b\u1ecf túi ta có <span class=\"math-tex\">$\\sqrt{3}$<\/span> = 1,732050808. Do \u0111ó, giá tr\u1ecb g\u1ea7n \u0111úng c\u1ee7a <span class=\"math-tex\">$\\sqrt{3}$<\/span> chính xác \u0111\u1ebfn hàng ph\u1ea7n tr\u0103m là 1,73.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> 1,73.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-27 03:57:31","option_type":"txt","len":0},{"id":"6622","mon_id":"1158767","chapter_id":"1158885","post_id":"6443","question":"<p>Bi\u1ebft s\u1ed1 g\u1ea7n \u0111úng a = 37975421 có \u0111\u1ed9 chính xác d = 150. Hãy xác \u0111\u1ecbnh các ch\u1eef s\u1ed1 \u0111áng tin c\u1ee7a a.<\/p>","options":["<strong>A. <\/strong>3, 7, 9","<strong>B. <\/strong>3, 7, 9, 7","<strong>C. <\/strong>3, 7, 9, 7 ,5","<strong>D. <\/strong>3, 7, 9, 7, 5, 4"],"correct":"3","level":"3","hint":"","answer":"<p>Vì sai s\u1ed1 tuy\u1ec7t \u0111\u1ed1i \u0111\u1ebfn hàng tr\u0103m nên các ch\u1eef s\u1ed1 hàng nghìn tr\u1edf lên c\u1ee7a a là \u0111áng tin.<\/p><p>V\u1eady các ch\u1eef s\u1ed1 \u0111áng tin c\u1ee7a a là 3, 7, 9, 7, 5.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>C. <\/strong>3, 7, 9, 7 ,5 .<\/span><\/p><p><meta charset=\"utf-8\" \/><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-27 04:05:02","option_type":"txt","len":2}]}
