{"common":{"save":0,"post_id":"4806","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8271","post_id":"4806","mon_id":"1158113","chapter_id":"1158126","question":"<p>T&igrave;m x bi\u1ebft<\/p><p>2x - 5,16&nbsp;= 12,64<\/p>","options":["x = 9,9","x = 8,9","x = 7,9","x = 10,9"],"correct":"2","level":"2","hint":"<p>T&igrave;m s\u1ed1 b\u1ecb tr\u1eeb = hi\u1ec7u + s\u1ed1 tr\u1eeb<\/p><p>T&igrave;m th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft = t&iacute;ch : th\u1eeba s\u1ed1 \u0111&atilde; bi\u1ebft<\/p>","answer":"<p>2x - 5,16&nbsp;= 12,64<\/p><p>2x&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 12,64 + 5,16<\/p><p>2x&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 17,8<\/p><p>&nbsp; x&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 17,8 : 2<\/p><p>&nbsp; x&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 8,9<\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\"><strong>x = 8,9<\/strong><\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"1","date":"2021-10-04 03:56:08","option_type":"txt","len":0},{"id":"8282","post_id":"4806","mon_id":"1158113","chapter_id":"1158126","question":"<p>T&iacute;nh&nbsp; M =&nbsp;<strong>2,5 . 4,9 + 2,5 . 1,1&nbsp;<\/strong><\/p><p>\u0110&aacute;p s\u1ed1<b> M =&nbsp;<\/b>&lt;input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/&gt;&lt;\/p>","options":"","correct":["[\"15\"]"],"level":"2","hint":"<p>\u0110\u1eb7t nh&acirc;n t\u1eed chung \u0111\u1ec3 nh&oacute;m c&aacute;c h\u1ea1ng t\u1eed m\u1ed9t c&aacute;ch th&iacute;ch h\u1ee3p.<\/p>","answer":"<p>&nbsp; &nbsp;2,5 . 4,9 + 2,5 . 1,1&nbsp;<\/p><p>= 2,5 .&nbsp;( 4,9 + 1,1 )<\/p><p>= 2,5 . 6<\/p><p>= 15<\/p><p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n l&agrave;&nbsp; &nbsp;<strong><span style=\"color:#16a085;\">15<\/span><\/strong><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-10-04 13:01:47"},{"id":"8284","post_id":"4806","mon_id":"1158113","chapter_id":"1158126","question":"<p>T&iacute;nh di\u1ec7n t&iacute;ch h&igrave;nh vu&ocirc;ng c&oacute; c\u1ea1nh b\u1eb1ng&nbsp; 3,6 cm<\/p>","options":["12,96 <span class=\"math-tex\">${cm}^2$<\/span>","12,69 <span class=\"math-tex\">${cm}^2$<\/span>","11,96 <span class=\"math-tex\">${cm}^2$<\/span>","11,69 <span class=\"math-tex\">${cm}^2$<\/span>"],"correct":"1","level":"2","hint":"<p>Di\u1ec7n t&iacute;ch h&igrave;nh vu&ocirc;ng b\u1eb1ng c\u1ea1nh nh&acirc;n c\u1ea1nh.<\/p>","answer":"<p>Di\u1ec7n t&iacute;ch h&igrave;nh vu&ocirc;ng l&agrave;&nbsp;<\/p><p>3,6 . 3,6 = 12,96 (&nbsp;<span class=\"math-tex\">${cm}^2$<\/span>&nbsp;)<\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; <span style=\"color:#16a085;\">12,96&nbsp;<span class=\"math-tex\">${cm}^2$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-10-04 13:05:07","option_type":"math","len":0}]}