{"common":{"save":0,"post_id":"8404","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4488","post_id":"8404","mon_id":"1159414","chapter_id":"1159496","question":"<p>Trong n\u0103m 2024, nhà An \u0111ã dùng h\u1ebft 180 m³ n\u01b0\u1edbc sinh ho\u1ea1t. H\u1ecfi trung bình m\u1ed9t tháng nhà An dùng h\u1ebft bao nhiêu \u0111\u1ec1-xi-mét kh\u1ed1i n\u01b0\u1edbc sinh ho\u1ea1t?<\/p>","options":["<strong>A.<\/strong> 15 dm³","<strong>B.<\/strong> 150 dm³","<strong>C.<\/strong> 15 000 dm³","<strong>D.<\/strong> 1500 dm³"],"correct":"3","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 15 000 dm³.<\/span><\/p><p>Trung bình m\u1ed9t tháng nhà An dùng h\u1ebft s\u1ed1 mét kh\u1ed1i n\u01b0\u1edbc sinh ho\u1ea1t là<\/p><p>180 : 12 = 15 m³ = 15 000 dm³.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-05 09:34:23","option_type":"txt","len":2},{"id":"4490","post_id":"8404","mon_id":"1159414","chapter_id":"1159496","question":"<p>B\u1ec3 n\u01b0\u1edbc c\u1ee7a m\u1ed9t toà nhà có 400 m³ n\u01b0\u1edbc. Ng\u01b0\u1eddi ta \u0111ang hút toàn b\u1ed9 n\u01b0\u1edbc t\u1eeb b\u1ec3 ra ngoài. Sau m\u1ed9t th\u1eddi gian k\u1ec3 t\u1eeb khi b\u1eaft \u0111\u1ea7u hút, l\u01b0\u1ee3ng n\u01b0\u1edbc trong b\u1ec3 gi\u1ea3m \u0111i 20%. H\u1ecfi trong b\u1ec3 còn l\u1ea1i bao nhiêu mét kh\u1ed1i n\u01b0\u1edbc?<\/p>","options":["<strong>A.<\/strong> 320 m³","<strong>B.<\/strong> 360 m³","<strong>C.<\/strong> 40 m³","<strong>D.<\/strong> 80 m³"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 320 m³.<\/span><\/p><p>S\u1ed1 ph\u1ea7n tr\u0103m th\u1ec3 tích n\u01b0\u1edbc còn l\u1ea1i là 100% – 20% = 80%.<\/p><p>S\u1ed1 mét kh\u1ed1i n\u01b0\u1edbc còn l\u1ea1i là 400 x 80 : 100 = 320 m³.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-05 09:39:00","option_type":"txt","len":1},{"id":"4492","post_id":"8404","mon_id":"1159414","chapter_id":"1159496","question":"<p>M\u1ed9t h\u1ed3 b\u01a1i dùng cho vi\u1ec7c thi \u0111\u1ea5u Olympic có th\u1ec3 tích là 830 m³. Bi\u1ebft ng\u01b0\u1eddi ta \u0111ang hút toàn b\u1ed9 n\u01b0\u1edbc trong h\u1ed3 \u0111\u1ec3 thay n\u01b0\u1edbc m\u1edbi. Sau m\u1ed9t th\u1eddi gian k\u1ec3 t\u1eeb khi b\u1eaft \u0111\u1ea7u hút, th\u1ec3 tích n\u01b0\u1edbc trong h\u1ed3 còn l\u1ea1i 30%. H\u1ecfi t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111ó \u0111ã hút \u0111\u01b0\u1ee3c bao nhiêu mét kh\u1ed1i n\u01b0\u1edbc trong h\u1ed3?<\/p>","options":["<strong>A.<\/strong> 249 m³","<strong>B.<\/strong> 580 m³","<strong>C.<\/strong> 250 m³","<strong>D.<\/strong> 581 m³"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 581 m³.<\/span><\/p><p>S\u1ed1 ph\u1ea7n tr\u0103m n\u01b0\u1edbc \u0111ã hút là 100% – 30% = 70%.<\/p><p>S\u1ed1 mét kh\u1ed1i n\u01b0\u1edbc \u0111ã hút là 830 x 70 : 100 = 581 m³.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-02-05 09:46:09","option_type":"txt","len":1}]}