{"common":{"save":0,"post_id":"4585","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6671","post_id":"4585","mon_id":"1158113","chapter_id":"1158128","question":"<p>B\u1ecf ngo\u1eb7c c\u1ee7a phép tính sau: <strong>(-74) - (-68) + (-72) - (38 - 74)<\/strong><\/p><p><img class=\"img_dd small\" src=\"\/data\/library\/con-vat\/chuot.png\" \/><\/p>","options":["<strong>A. <\/strong>-74 + 68 -72 - 38 + 74","<strong>B. <\/strong>74 + 68 - 72 - 38 + 74","<strong>C. <\/strong>-74 + 68 + 72 - 38 - 74"],"correct":"1","level":"2","hint":"<p>Khi b\u1ecf d\u1ea5u ngo\u1eb7c, n\u1ebfu có d\u1ea5u <strong>c\u1ed9ng<\/strong> \u0111\u1eb1ng tr\u01b0\u1edbc thì ta <strong>gi\u1eef nguyên d\u1ea5u<\/strong> c\u1ee7a các s\u1ed1 h\u1ea1ng trong ngo\u1eb7c;<\/p><p>n\u1ebfu có d\u1ea5u <strong>tr\u1eeb<\/strong> \u0111\u1eb1ng tr\u01b0\u1edbc thì ta <strong>\u0111\u1ed5i d\u1ea5u<\/strong> t\u1ea5t c\u1ea3 các s\u1ed1 h\u1ea1ng trong ngo\u1eb7c: c\u1ed9ng thành tr\u1eeb và tr\u1eeb thành c\u1ed9ng.<\/p>","answer":"<p><strong>(-74) - (-68) + (-72) - (38 - 74)<\/strong><\/p><p>= -74 + 68 -72 - 38 + 74<\/p><p>Xét <strong>A.<\/strong> -74 + 68 -72 - 38 + 74 <span style=\"color:#9b59b6;\">\u0111úng<\/span><\/p><p><strong>B. <\/strong>74 + 68 - 72 - 38 + 74 <span style=\"color:#c0392b;\">sai<\/span><\/p><p><strong>C. <\/strong>-74 + 68 + 72 - 38 - 74 <span style=\"color:#c0392b;\">sai<\/span><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A. -74 + 68 -72 - 38 + 74<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-27 02:33:28","option_type":"txt","len":2},{"id":"6673","post_id":"4585","mon_id":"1158113","chapter_id":"1158128","question":"<p>Ch\u1ecdn câu \u0111úng.<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/con-vat\/tho7.png\" \/><\/div>","options":["<strong>A. <\/strong>(-365) . 367 > 1","<strong>B. <\/strong>(-365) . 367 = 1","<strong>C. <\/strong>(-365) . 367 < 1"],"correct":"3","level":"2","hint":"<p>So sánh tích (-365) . 367 v\u1edbi 0<\/p>","answer":"<p>Vì tích c\u1ee7a hai s\u1ed1 nguyên trái d\u1ea5u luôn nh\u1ecf h\u01a1n 0 nên (-365) . 367 < 0 mà 0 < 1 nên (-365) . 367 < 1.<\/p><p>Xét<\/p><p><strong>A. <\/strong>(-365) . 367 > 1 <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>B.<\/strong>(-365) . 367 = 1 <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>C. <\/strong>(-365) . 367 < 1 \u0111úng<\/p><p>V\u1eady \u0111áp án \u0111úng là<span style=\"color:#16a085;\"><strong> C. (-365) . 367 < 1<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-27 02:41:12","option_type":"txt","len":2},{"id":"6674","post_id":"4585","mon_id":"1158113","chapter_id":"1158128","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a phép tính a - ( -b + c - d) là?<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/con-vat\/con-khi.png\" \/><\/div>","options":["<strong>A.<\/strong> a + b + c + d","<strong>B.<\/strong> a + b - c + d","<strong>C.<\/strong> a - b - c - d"],"correct":"2","level":"2","hint":"<p>Khi b\u1ecf d\u1ea5u ngo\u1eb7c, n\u1ebfu có d\u1ea5u <strong>c\u1ed9ng<\/strong> \u0111\u1eb1ng tr\u01b0\u1edbc thì ta <strong>gi\u1eef nguyên d\u1ea5u<\/strong> c\u1ee7a các s\u1ed1 h\u1ea1ng trong ngo\u1eb7c;<\/p><p>n\u1ebfu có d\u1ea5u <strong>tr\u1eeb<\/strong> \u0111\u1eb1ng tr\u01b0\u1edbc thì ta <strong>\u0111\u1ed5i d\u1ea5u<\/strong> t\u1ea5t c\u1ea3 các s\u1ed1 h\u1ea1ng trong ngo\u1eb7c: c\u1ed9ng thành tr\u1eeb và tr\u1eeb thành c\u1ed9ng.<\/p>","answer":"<p>Ta có: a - ( -b + c - d) = a + b - c + d. Xét<\/p><p><strong>A.<\/strong> a + b + c + d <span style=\"color:#e74c3c;\">sai<\/span><\/p><p><strong>B.<\/strong> a + b - c + d <span style=\"color:#16a085;\">\u0111úng<\/span><\/p><p><strong>C.<\/strong> a - b - c - d <span style=\"color:#e74c3c;\">sai<\/span><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B. a + b - c + d<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-27 02:45:18","option_type":"txt","len":2}]}