{"common":{"save":0,"post_id":"4772","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7977","post_id":"4772","mon_id":"1158113","chapter_id":"1158128","question":"<p>T&iacute;nh:&nbsp;<\/p><p>(-40) . ( 25&nbsp;+ 110) = ?<\/p>","options":["-5040","-5400","-5004"],"correct":"2","level":"2","hint":"<p>S\u1eed d\u1ee5ng t&iacute;nh ch\u1ea5t ph&acirc;n ph\u1ed1i c\u1ee7a ph&eacute;p nh&acirc;n \u0111\u1ed1i v\u1edbi ph&eacute;p c\u1ed9ng \u0111\u1ec3 t&iacute;nh nhanh.<\/p>","answer":"<p>(-40) . ( 25&nbsp;+ 110) = (-40) . 25 + (-40) . 110 = (-1000) + (-4400) = -5400<\/p><p>V\u1eady \u0111&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;&nbsp;<span style=\"color:#16a085;\"><strong>-5400<\/strong><\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-10-01 23:05:51","option_type":"number","len":0},{"id":"7979","post_id":"4772","mon_id":"1158113","chapter_id":"1158128","question":"<p>T&iacute;nh:<\/p><p>(+2) . (-4) . (-125) . 25 . (-8) . (-50) = ?&nbsp;<\/p>","options":["10 000 000","1 000 000","-10 000 000"],"correct":"1","level":"2","hint":"<p>D&ugrave;ng t&iacute;nh ch\u1ea5t giao ho&aacute;n v&agrave; k\u1ebft h\u1ee3p c\u1ee7a ph&eacute;p nh&acirc;n \u0111\u1ec3 t&iacute;nh m\u1ed9t c&aacute;ch th&iacute;ch h\u1ee3p.<\/p>","answer":"<p>(+2) . (-4) . (-125) . 25 . (-8) . (-50)&nbsp;<\/p><p>= [(+2) . (-50)]&nbsp;. [(-4) . 25]&nbsp;. [(-125)&nbsp;. (-8)]<\/p><p>=(-100) . (-100) . 1000<\/p><p>= 10 000 000<\/p><p>V\u1eady \u0111&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp;<span style=\"color:#16a085;\"><strong>10 000 000<\/strong><\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-01 23:12:03","option_type":"txt","len":1},{"id":"7981","post_id":"4772","mon_id":"1158113","chapter_id":"1158128","question":"<p>T&iacute;nh gi&aacute; tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c sau t\u1ea1i x= -30<\/p><p>P = 2 . (+125) . x . (-8)&nbsp;<\/p>","options":["P = -60 000","P = 6000","P = 60 000"],"correct":"3","level":"2","hint":"<p>Thay x = -30 v&agrave;o bi\u1ec3u th\u1ee9c r\u1ed3i t&iacute;nh m\u1ed9t c&aacute;ch h\u1ee3p l&iacute;.<\/p>","answer":"<p>T\u1ea1i x = -30 th&igrave;<\/p><p>P = 2 . (+125) . (-30) . (-8)&nbsp;<\/p><p>P = [2 . (-30)]&nbsp;. [(+125) . (-8)]<\/p><p>P = (-60) . (-1000)<\/p><p>P = 60 000<\/p><p>V\u1eady \u0111&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <span style=\"color:#16a085;\"><strong>P = 60 000<\/strong><\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-01 23:16:50","option_type":"txt","len":1}]}