{"common":{"save":0,"post_id":"4771","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7937","post_id":"4771","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính <strong>(-23) . 5 = ?<\/strong><\/p>","options":["115","-18","-115"],"correct":"3","level":"1","hint":"<p>Mu\u1ed1n nhân hai s\u1ed1 nguyên khác d\u1ea5u ta nhân ph\u1ea7n s\u1ed1 t\u1ef1 nhiên c\u1ee7a hai s\u1ed1 \u0111ó v\u1edbi nhau r\u1ed3i \u0111\u1eb7t d\u1ea5u tr\u1eeb " - " tr\u01b0\u1edbc k\u1ebft qu\u1ea3 nh\u1eadn \u0111\u01b0\u1ee3c. <\/p>","answer":"<p><strong>(-23) . 5 = - (23 . 5) = -115<\/strong><\/p><p>V\u1eady \u0111áp án \u0111úng là<strong> <span style=\"color:#16a085;\">-115<\/span><\/strong><\/p>","type":"choose","extra_type":"star","time":"0","user_id":"132","test":"1","date":"2021-10-01 06:57:59","option_type":"txt","len":0},{"id":"7938","post_id":"4771","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính:<\/p><p><strong>(-2) . (-3) . 5 = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> <\/strong><\/p><p><strong>6 . 3 . (-4) = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/strong><\/p>","options":"","correct":["[\"30\",\"-72\"]"],"level":"1","hint":"<p>Mu\u1ed1n nhân hai s\u1ed1 nguyên khác d\u1ea5u ta nhân ph\u1ea7n s\u1ed1 t\u1ef1 nhiên c\u1ee7a hai s\u1ed1 \u0111ó v\u1edbi nhau r\u1ed3i \u0111\u1eb7t d\u1ea5u tr\u1eeb " - " tr\u01b0\u1edbc k\u1ebft qu\u1ea3 nh\u1eadn \u0111\u01b0\u1ee3c.<\/p><p>Mu\u1ed1n nhân hai s\u1ed1 nguyên cùng d\u1ea5u ta nhân ph\u1ea7n s\u1ed1 t\u1ef1 nhiên c\u1ee7a hai s\u1ed1 \u0111ó v\u1edbi nhau.<\/p>","answer":"<p><strong>(-2) . (-3) . 5 = 6 . 5 = 30<\/strong><\/p><p><strong>6 . 3 . (-4) = 18 . (-4) = -72<\/strong><\/p><p>V\u1eady các s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t là <strong> <span style=\"color:#16a085;\">30<\/span> ; <span style=\"color:#16a085;\"> -72<\/span><\/strong><\/p>","type":"blank","extra_type":"","time":"0","user_id":"132","test":"1","date":"2021-10-01 07:02:07"},{"id":"7940","post_id":"4771","mon_id":"1158113","chapter_id":"1158128","question":"<p>Trong các tích sau, tích nào bé h\u01a1n 0?<\/p>","options":["(-19) . (-23)","34 . 43","(-13) . 72","(+9) . (+76)"],"correct":"3","level":"1","hint":"<p>Tích c\u1ee7a hai s\u1ed1 nguyên cùng d\u1ea5u là m\u1ed9t s\u1ed1 nguyên <strong>d\u01b0\u01a1ng<\/strong>.<\/p><p>Tích c\u1ee7a hai s\u1ed1 nguyên khác d\u1ea5u là m\u1ed9t s\u1ed1 nguyên <strong>âm<\/strong>.<\/p>","answer":"<p>Vì tích c\u1ee7a hai s\u1ed1 nguyên cùng d\u1ea5u là m\u1ed9t s\u1ed1 nguyên <strong>d\u01b0\u01a1ng <\/strong>nên (-19) . (-23) > 0 ; 34 . 43 > 0 ; (+9) . (+76) > 0<\/p><p>Tích c\u1ee7a hai s\u1ed1 nguyên khác d\u1ea5u là m\u1ed9t s\u1ed1 nguyên <strong>âm <\/strong>nên<strong> <\/strong>(-13) . 72 < 0<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>(-13) . 72<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"1","date":"2021-10-01 07:06:41","option_type":"txt","len":1}]}
