{"common":{"save":0,"post_id":"4468","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6042","post_id":"4468","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh&nbsp;<\/p><p><span class=\"math-tex\">$ \\dfrac{5}{12} + \\dfrac{-13}{12}$<\/span>&nbsp;= ?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$ \\dfrac{8}{12}$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$ \\dfrac{-8}{12}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\dfrac{-2}{3}$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$ \\dfrac{2}{3}$<\/span>"],"correct":"3","level":"1","hint":"<p>Mu\u1ed1n c\u1ed9ng hai ph&acirc;n s\u1ed1 c&oacute; c&ugrave;ng m\u1eabu, ta c\u1ed9ng c&aacute;c t\u1eed v&agrave; gi\u1eef nguy&ecirc;n m\u1eabu. N\u1ebfu k\u1ebft qu\u1ea3 ch\u01b0a t\u1ed1i gi\u1ea3n th&igrave; ph\u1ea3i r&uacute;t g\u1ecdn v\u1ec1 t\u1ed1i gi\u1ea3n.<\/p>","answer":"<p>Mu\u1ed1n c\u1ed9ng hai ph&acirc;n s\u1ed1 c&oacute; c&ugrave;ng m\u1eabu ta c\u1ed9ng c&aacute;c&nbsp;t\u1eed v&agrave; gi\u1eef nguy&ecirc;n m\u1eabu.<\/p><p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$ \\dfrac{5}{12}+ \\dfrac{-13}{12} = \\dfrac{5+(-13)}{12}= \\dfrac{-8}{12} =$<\/span>&nbsp;&nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$ \\dfrac{-2}{3}$<\/span><\/span>&nbsp;(r&uacute;t v\u1ec1 t\u1ed1i gi\u1ea3n b\u1eb1ng c&aacute;ch chia c\u1ea3 t\u1eed v&agrave; m\u1eabu cho 4).<\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave; <strong><span style=\"color:#16a085;\">C<\/span><\/strong>.<span style=\"color:#16a085;\"><span class=\"math-tex\">$ \\dfrac{-2}{3}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-08-20 10:59:10","option_type":"math","len":0},{"id":"6043","post_id":"4468","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh&nbsp;<\/p><p><span class=\"math-tex\">$\\dfrac{-6}{5} + \\dfrac{2}{5} + \\dfrac{4}{5}$<\/span>&nbsp;=&nbsp;&lt;input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/&gt;&nbsp;<\/p><div class=\"lt123_imgs\"><img class=\"img_dd tiny\" src=\"\/data\/library\/chu_cai_chu_so\/hoa.png\" \/><img class=\"img_dd tiny\" src=\"\/data\/library\/chu_cai_chu_so\/thang.png\" \/><\/div>","options":"","correct":["[\"0\"]"],"level":"1","hint":"<p>C\u1ed9ng c&aacute;c t\u1eed v&agrave; gi\u1eef nguy&ecirc;n m\u1eabu. \u0110\u01b0a k\u1ebft qu\u1ea3 v\u1ec1 ph&acirc;n s\u1ed1&nbsp;t\u1ed1i gi\u1ea3n.<\/p>","answer":"<p>Ta c&oacute;&nbsp;<span class=\"math-tex\">$ \\dfrac{-6}{5}+ \\dfrac{2}{5}+ \\dfrac{4}{5}= \\dfrac{-6+2+4}{5} =\\dfrac{0}{5}=$<\/span>&nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$0$<\/span><\/span><\/p><p>Ch\u1ed7 tr\u1ed1ng c\u1ea7n \u0111i\u1ec1n l&agrave; s\u1ed1 <strong><span style=\"color:#16a085;\">0<\/span><\/strong>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-08-20 11:05:29"},{"id":"6050","post_id":"4468","mon_id":"1158113","chapter_id":"1158119","question":"<p>T&iacute;nh<\/p><p><span class=\"math-tex\">$\\dfrac{23}{6}+\\dfrac{17}{9}$<\/span>&nbsp;= ?<\/p>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$\\dfrac{103}{18}$<\/span>","<strong>B<\/strong>. <span class=\"math-tex\">$\\dfrac{18}{103}$<\/span>","<strong>C<\/strong>. <span class=\"math-tex\">$\\dfrac{40}{15}$<\/span>"],"correct":"1","level":"1","hint":"<p>Mu\u1ed1n c\u1ed9ng hai ph&acirc;n s\u1ed1 kh&ocirc;ng c&ugrave;ng m\u1eabu, ta quy \u0111\u1ed3ng m\u1eabu hai ph&acirc;n s\u1ed1 r\u1ed3i c\u1ed9ng c&aacute;c t\u1eed m\u1edbi v&agrave; gi\u1eef nguy&ecirc;n m\u1eabu m\u1edbi.<\/p>","answer":"<p>MC: 18<\/p><p>Ta c&oacute;:&nbsp;&nbsp;&nbsp;<span class=\"math-tex\">$\\dfrac{23}{6}+\\dfrac{17}{9}=\\dfrac{23.3}{6.3}+\\dfrac{17.2}{9.2}= \\dfrac{69}{18}+\\dfrac{34}{18}=\\dfrac{69+34}{18}=$<\/span>&nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{103}{18}$<\/span>&nbsp;&nbsp;<\/span><\/p><p>\u0110&aacute;p &aacute;n l&agrave; <span style=\"color:#16a085;\"><strong>A<\/strong><\/span>.<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{103}{18}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-08-20 11:54:49","option_type":"math","len":0}]}