{"common":{"save":0,"post_id":"8372","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4211","post_id":"8372","mon_id":"1159414","chapter_id":"1159495","question":"<p>Tìm 30% c\u1ee7a 140 kg.<\/p>","options":["<strong>A.<\/strong> 420 kg","<strong>B.<\/strong> 52 kg","<strong>C.<\/strong> 0,52 kg","<strong>D.<\/strong> 42 kg"],"correct":"4","level":"1","hint":"<p>30% c\u1ee7a 140 kg là:<\/p><p><span class=\"math-tex\">$140\\times\\dfrac{30}{100}$<\/span><\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#27ae60;\"><\/span><span style=\"color:#16a085;\"><strong>D.<\/strong> 42 kg<\/span><\/p><p>30% c\u1ee7a 140 kg là:<\/p><p><span class=\"math-tex\">$140\\times\\dfrac{30}{100}=140\\times30:100=42$<\/span> (kg)<\/p><p>\u0110áp s\u1ed1: <strong>42 kg<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-28 08:24:46","option_type":"txt","len":0},{"id":"4213","post_id":"8372","mon_id":"1159414","chapter_id":"1159495","question":"<p>Tìm 5% c\u1ee7a 30 t\u1ea1.<\/p>","options":["<strong>A.<\/strong> 1,5 t\u1ea1","<strong>B.<\/strong> 1,5 kg","<strong>C.<\/strong> 15 t\u1ea1","<strong>D.<\/strong> 15 kg"],"correct":"1","level":"1","hint":"<p>5% c\u1ee7a 30 t\u1ea1 là:<\/p><p><span class=\"math-tex\">$30\\times\\dfrac{5}{100}$<\/span> <\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> 1,5 t\u1ea1<\/span><\/p><p>5% c\u1ee7a 30 t\u1ea1 là:<\/p><p><span class=\"math-tex\">$30\\times\\dfrac{5}{100}=30\\times5:100=1,5$<\/span> (t\u1ea1)<\/p><p>\u0110áp s\u1ed1: <strong>1,5 t\u1ea1<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-28 08:27:12","option_type":"txt","len":0},{"id":"4215","post_id":"8372","mon_id":"1159414","chapter_id":"1159495","question":"<p>Tìm 8% c\u1ee7a 200 000 \u0111\u1ed3ng.<\/p>","options":["<strong>A.<\/strong> 160 000 \u0111\u1ed3ng","<strong>B.<\/strong> 16 000 \u0111\u1ed3ng","<strong>C.<\/strong> 1600 \u0111\u1ed3ng","<strong>D.<\/strong> 80 000 \u0111\u1ed3ng"],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 16 000 \u0111\u1ed3ng<\/span><\/p><p>8% c\u1ee7a 200 000 \u0111\u1ed3ng là:<\/p><p><span class=\"math-tex\">$200000\\times\\dfrac{8}{100}=200000\\times8:100=16000$<\/span> (\u0111\u1ed3ng)<\/p><p>\u0110áp s\u1ed1: <strong>16 000 \u0111\u1ed3ng<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-01-28 08:31:09","option_type":"txt","len":1}]}