{"common":{"save":0,"post_id":"4606","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6814","post_id":"4606","mon_id":"1158113","chapter_id":"1158126","question":"<p>Tìm x, bi\u1ebft<\/p><p>x - (-2,4) + (0,54 + 1,26) = 8,56<\/p>","options":["x = -4,36","x = 4,36","x = 12,76"],"correct":"2","level":"2","hint":"<p>Mu\u1ed1n tìm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft, ta l\u1ea5y t\u1ed5ng tr\u1eeb s\u1ed1 h\u1ea1ng \u0111ã bi\u1ebft.<\/p><p>Chú ý th\u1ee9 t\u1ef1 th\u1ef1c hi\u1ec7n phép tính và quy t\u1eafc b\u1ecf d\u1ea5u ngo\u1eb7c.<\/p>","answer":"<p>x - (-2,4) + (0,54 + 1,26) = 8,56 (thu g\u1ecdn v\u1ebf trái tr\u01b0\u1edbc)<\/p><p>x + 2,4 + 1,8 = 8,56<\/p><p>x + 4,2 = 8,56 (tìm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft)<\/p><p>x = 8,56 - 4,2<\/p><p><span style=\"color:#16a085;\"><strong>x = 4,36<\/strong><\/span><\/p><p>\u0110áp án \u0111úng là<b> <span style=\"color:#16a085;\">x = 4,36<\/span><\/b><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"1","date":"2021-08-29 03:58:04","option_type":"txt","len":0},{"id":"6815","post_id":"4606","mon_id":"1158113","chapter_id":"1158126","question":"<p>Tính giá tr\u1ecb các bi\u1ec3u th\u1ee9c sau<\/p><p>A = 1,5 . 5,68 - 1,5 . 9,68 - 6,25 . 1,5<\/p><p><strong>A = <\/strong><input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"-15,375\"]"],"level":"2","hint":"<p>S\u1eed d\u1ee5ng ngo\u1eb7c và các tính ch\u1ea5t c\u1ee7a các phép tính v\u1edbi s\u1ed1 th\u1eadp phân \u0111\u1ec3 nhóm các s\u1ed1 h\u1ea1ng m\u1ed9t cách thích h\u1ee3p.<\/p>","answer":"<p>A = 1,5 . 5,68 - 1,5 . 9,68 - 6,25 . 1,5<\/p><p>A = 1,5 . (5,68 - 9,68 - 6,25)<\/p><p>A = 1,5 . [5,68 + (-9,68) + (-6,25)]<\/p><p>A = 1,5 . [-(9,68 - 5,68) + (-6,25)]<\/p><p>A = 1,5 . [-4 + (-6,25)]<\/p><p>A = 1,5 . [-(4 + 6,25)]<\/p><p>A = 1,5 . (-10,25)<\/p><p>A = -(1,5 . 10,25)<\/p><p>A = <span style=\"color:#16a085;\"><strong>-15,375<\/strong><\/span><\/p><p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là <span style=\"color:#16a085;\"><b> -15,375<\/b><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-08-29 04:06:37"},{"id":"6863","post_id":"4606","mon_id":"1158113","chapter_id":"1158126","question":"<p>Tính nhanh<\/p><p>(-128,4) + (6,27 - 5,92) - (7,27 - 128,4)<\/p>","options":["-6,92 ","-263,72","263,72","6,92"],"correct":"1","level":"2","hint":"<p>Phá ngo\u1eb7c r\u1ed3i nhóm các s\u1ed1 h\u1ea1ng m\u1ed9t cách thích h\u1ee3p.<\/p>","answer":"<p> (-128,4) + (6,27 - 5,92) - (7,27 - 128,4)<\/p><p>= -128,4 + 6,27 - 5,92 - 7,27 + 128,4<\/p><p>= -128,4 + 128,4 + 6,27 - 7,27 - 5,92<\/p><p>= (-128,4 + 128,4) - (7,27 - 6,27) - 5,92<\/p><p>= 0 - 1 - 5,92<\/p><p>= -(1 + 5,92)<\/p><p>=<strong><span style=\"color:#16a085;\"> -6,92<\/span><\/strong><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong> -6,92<\/strong><\/span><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"131","test":"1","date":"2021-08-29 14:46:41","option_type":"txt","len":0}]}
