{"common":{"save":0,"post_id":"4538","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6728","post_id":"4538","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính r\u1ed3i so sánh k\u1ebft qu\u1ea3 c\u1ee7a 13 + (15 - 17) và 13 + 15 - 17<\/p>","options":["<strong>A.<\/strong> 13 + (15 - 17) = 13 + 15 - 17","<strong>B.<\/strong> 13 + (15 - 17) < 13 + 15 - 17","<strong>C.<\/strong> 13 + (15 - 17) > 13 + 15 - 17"],"correct":"1","level":"1","hint":"","answer":"<p>Ta có: 13 + (15 - 17) = 13 + [ - (17 - 15) ] = 13 + (-2) = 11<\/p><p> 13 + 15 - 17 = 28 - 17 = 11<\/p><p>Vì 11 = 11 nên 13 + (15 - 17) = 13 + 15 - 17<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A. 13 + (15 - 17) = 13 + 15 - 17<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-27 13:52:27","option_type":"txt","len":2},{"id":"6821","post_id":"4538","mon_id":"1158113","chapter_id":"1158128","question":"<p>B\u1ecf d\u1ea5u ngo\u1eb7c và tính t\u1ed5ng sau<\/p><p>-258 + (-32) - 156 - (-26)<\/p>","options":["420","-420","-472"],"correct":"2","level":"1","hint":"<p>Quy t\u1eafc d\u1ea5u ngo\u1eb7c: Khi b\u1ecf d\u1ea5u ngo\u1eb7c ta ph\u1ea3i<\/p><p>+ Gi\u1eef nguyên d\u1ea5u c\u1ee7a các s\u1ed1 trong ngo\u1eb7c n\u1ebfu tr\u01b0\u1edbc ngo\u1eb7c là d\u1ea5u c\u1ed9ng<\/p><p>+ \u0110\u1ed5i d\u1ea5u các s\u1ed1 trong ngo\u1eb7c n\u1ebfu tr\u01b0\u1edbc ngo\u1eb7c là d\u1ea5u tr\u1eeb<\/p>","answer":"<p> -258 + (-32) - 156 - (-26)<\/p><p>= -258 - 32 - 156 + 26<\/p><p>= (-258-32) + (-156 + 26)<\/p><p>= -(258+32) - (156 - 26)<\/p><p>= -290 - 130<\/p><p>= -(290 + 130)<\/p><p>= <span style=\"color:#16a085;\"><strong>-420<\/strong><\/span><\/p><p>\u0110áp án \u0111úng là<b> <span style=\"color:#16a085;\">-420<\/span><\/b><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"3","date":"2021-08-29 11:24:54","option_type":"txt","len":0},{"id":"6822","post_id":"4538","mon_id":"1158113","chapter_id":"1158128","question":"<p>B\u1ecf d\u1ea5u ngo\u1eb7c và tính t\u1ed5ng sau<\/p><p>34 - (-66) + (-128)<\/p>","options":["-28","28"],"correct":"1","level":"1","hint":"<p>Quy t\u1eafc d\u1ea5u ngo\u1eb7c: Khi b\u1ecf d\u1ea5u ngo\u1eb7c ta ph\u1ea3i<\/p><p>+ Gi\u1eef nguyên d\u1ea5u c\u1ee7a các s\u1ed1 trong ngo\u1eb7c n\u1ebfu tr\u01b0\u1edbc ngo\u1eb7c là d\u1ea5u c\u1ed9ng<\/p><p>+ \u0110\u1ed5i d\u1ea5u các s\u1ed1 trong ngo\u1eb7c n\u1ebfu tr\u01b0\u1edbc ngo\u1eb7c là d\u1ea5u tr\u1eeb<\/p>","answer":"<p> 34 - (-66) + (-128)<\/p><p>= 34 + 66 - 128<\/p><p>= (34 + 66) - 128<\/p><p>= 100 - 128<\/p><p>= -(128 - 100)<\/p><p>= <strong><span style=\"color:#16a085;\">-28<\/span><\/strong><\/p><p>\u0110áp án \u0111úng là <strong><span style=\"color:#16a085;\">-28<\/span><\/strong><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"132","test":"3","date":"2021-08-29 11:26:51","option_type":"txt","len":0}]}
