{"common":{"save":0,"post_id":"5723","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6939","post_id":"5723","mon_id":"1158532","chapter_id":"1158543","question":"<p>So sánh hai s\u1ed1 th\u1ef1c <span class=\"math-tex\">$\\sqrt{120}$<\/span> và <span class=\"math-tex\">$\\sqrt{112}$<\/span>.<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-an\/tui-keo.png\" \/><\/div>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\sqrt{120}$<\/span> > <span class=\"math-tex\">$\\sqrt{112}$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\sqrt{120}$<\/span> < <span class=\"math-tex\">$\\sqrt{112}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\sqrt{120}$<\/span> = <span class=\"math-tex\">$\\sqrt{112}$<\/span>","<strong>D. <\/strong>Không so sánh \u0111\u01b0\u1ee3c"],"correct":"1","level":"1","hint":"<p>V\u1edbi <span class=\"math-tex\">$0 < a < b \\space$<\/span> thì <span class=\"math-tex\">$\\sqrt{a}<\\sqrt{b} \\space$<\/span><\/p>","answer":"<p>Vì 120 > 112 > 0 nên <strong> <\/strong><span class=\"math-tex\">$\\sqrt{120}$<\/span> > <span class=\"math-tex\">$\\sqrt{112}$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A. <\/strong><span class=\"math-tex\">$\\sqrt{120}$<\/span> > <span class=\"math-tex\">$\\sqrt{112}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-04-05 09:33:49","option_type":"math","len":0},{"id":"6940","post_id":"5723","mon_id":"1158532","chapter_id":"1158543","question":"<p>Kh\u1eb3ng \u0111\u1ecbnh sau \u0111úng hay sai?<\/p><p>"M\u1ed7i s\u1ed1 vô t\u1ec9 \u0111\u1ec1u là m\u1ed9t s\u1ed1 th\u1ef1c."<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-an\/hop-banh2.png\" \/><\/div>","options":["\u0110úng","Sai","Không xác \u0111\u1ecbnh \u0111\u01b0\u1ee3c"],"correct":"1","level":"1","hint":"<p>S\u1ed1 h\u1eefu t\u1ec9 và s\u1ed1 vô t\u1ec9 \u0111\u01b0\u1ee3c g\u1ecdi chung là s\u1ed1 th\u1ef1c.<\/p>","answer":"<p>"M\u1ed7i s\u1ed1 vô t\u1ec9 \u0111\u1ec1u là m\u1ed9t s\u1ed1 th\u1ef1c."<\/p><p>\u0110ây là m\u1ed9t kh\u1eb3ng \u0111\u1ecbnh \u0111úng vì s\u1ed1 h\u1eefu t\u1ec9 và s\u1ed1 vô t\u1ec9 \u0111\u01b0\u1ee3c g\u1ecdi chung là s\u1ed1 th\u1ef1c.<\/p><p>\u0110áp án là <span style=\"color:#16a085;\">\u0110úng<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-04-05 09:37:35","option_type":"txt","len":2},{"id":"6941","post_id":"5723","mon_id":"1158532","chapter_id":"1158543","question":"<p>Làm tròn s\u1ed1 1237,432 \u0111\u1ebfn hàng ch\u1ee5c \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 là:<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-an\/hop-banh.png\" \/><\/div>","options":["1200","1230","1240","1237"],"correct":"3","level":"1","hint":"<p>\u0110\u1ec3 làm tròn s\u1ed1 th\u1eadp phân d\u01b0\u01a1ng t\u1edbi m\u1ed9t hàng nào \u0111ó (g\u1ecdi là hàng làm tròn), ta làm nh\u01b0 sau:<\/p><p>- \u0110\u1ed1i v\u1edbi ch\u1eef s\u1ed1 hàng làm tròn:<\/p><p> + Gi\u1eef nguyên n\u1ebfu ch\u1eef s\u1ed1 sau hàng làm tròn nh\u1ecf h\u01a1n 5;<\/p><p> + T\u0103ng 1 \u0111\u01a1n v\u1ecb n\u1ebfu ch\u1eef s\u1ed1 sau hàng làm tròn l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5<\/p><p>- \u0110\u1ed1i v\u1edbi ch\u1eef s\u1ed1 sau hàng làm tròn:<\/p><p> + B\u1ecf \u0111i n\u1ebfu \u1edf ph\u1ea7n th\u1eadp phân;<\/p><p> + Thay b\u1eb1ng các ch\u1eef s\u1ed1 0 n\u1ebfu \u1edf ph\u1ea7n s\u1ed1 nguyên<\/p>","answer":"<p>Làm tròn s\u1ed1 1237,432 \u0111\u1ebfn hàng ch\u1ee5c \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 là: <\/p><p>12<span style=\"color:#e74c3c;\">37<\/span>,432 ≈ 1240 (vì ch\u1eef s\u1ed1 sau hàng làm tròn là 7 > 5)<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\">1240<\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"1","date":"2022-04-05 09:40:58","option_type":"txt","len":0}]}