{"common":{"save":0,"post_id":"799","level":2,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1521","post_id":"799","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"M\u1eabu s\u1ed1 chung nh\u1ecf nh\u1ea5t c\u1ee7a hai ph\u00e2n s\u1ed1 $\\dfrac{13}{2^2 . 3 . 5^2}$ v\u00e0 $\\dfrac{11}{2^4 . 3^2 . 5 . 7}$ l\u00e0:","select":["A. $2^2 . 3 . 5 . 7$ ","B. $2^4 . 3^2 . 5^2 . 7$ ","C. $2^5 . 3^3 . 5^3 . 7$","D. $2 . 3 . 5 . 7$ "],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>V\u00ec c\u00e1c m\u1eabu s\u1ed1 \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 n\u00ean: <br\/> M\u1eabu s\u1ed1 chung l\u00e0: $BCNN(2^2 . 3 . 5^2, 2^4 . 3^2 . 5 . 7) = 2^4 . 3^2 . 5^2 . 7$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:52"},{"id":"1522","post_id":"799","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"M\u1eabu s\u1ed1 chung nh\u1ecf nh\u1ea5t c\u1ee7a hai ph\u00e2n s\u1ed1 $\\dfrac{-19}{3^2 . 7 . 11}$ v\u00e0 $\\dfrac{-23}{3 . 7^2 . 13}$","select":["A. $3 . 7 . 13$ ","B. $3^2 . 7^2 . 11 . 13$ ","C. $3^2 . 7 . 11 . 13$","D. $3 . 7^2 . 11 . 13$ "],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/>V\u00ec c\u00e1c m\u1eabu s\u1ed1 \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1 n\u00ean: <br\/> M\u1eabu s\u1ed1 chung l\u00e0: $BCNN(3^2 . 7 . 11, 3 . 7^2 . 13) = 3^2 . 7^2 . 11 . 13$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:52"},{"id":"1523","post_id":"799","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["243"],["432"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"R\u00fat g\u1ecdn r\u1ed3i quy \u0111\u1ed3ng m\u1eabu s\u1ed1 c\u00e1c ph\u00e2n s\u1ed1 $\\dfrac{-12}{81}; \\dfrac{36}{64}$ v\u00e0 ph\u00e2n s\u1ed1 $\\dfrac{25}{-30}$ ta \u0111\u01b0\u1ee3c 3 ph\u00e2n s\u1ed1 l\u00e0: <br\/> $ \\dfrac{-64}{432};$ <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>; $\\dfrac{-360}{432}$ ","hint":"R\u00fat g\u1ecdn c\u00e1c ph\u00e2n s\u1ed1 \u0111\u1ebfn t\u1ed1i gi\u1ea3n r\u1ed3i quy \u0111\u1ed3ng ","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> R\u00fat g\u1ecdn c\u00e1c ph\u00e2n s\u1ed1 tr\u00ean <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm m\u1eabu s\u1ed1 chung ch\u00ednh b\u1eb1ng BCNN c\u1ee7a c\u00e1c m\u1eabu s\u1ed1 <br\/> <b> B\u01b0\u1edbc 3: <\/b> Quy \u0111\u1ed3ng m\u1eabu c\u00e1c ph\u00e2n s\u1ed1 <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\dfrac{-12}{81} = \\dfrac{-12 : 3}{81 : 3} = \\dfrac{-4}{27}$ <br\/> $\\dfrac{36}{64} = \\dfrac{36 : 4}{64 : 4} = \\dfrac{9}{16}$ <br\/> $\\dfrac{25}{-30} = \\dfrac{25 : (-5)}{-30 : (-5)} = \\dfrac{-5}{6}$ <br\/> M\u1eabu s\u1ed1 chung: BCNN(27, 16, 6) = 432 <br\/> Th\u1eeba s\u1ed1 ph\u1ee5: 432 : 27 = 16; 432 : 16 = 27; 432 : 6 = 72 <br\/> $\\dfrac{-4}{27} = \\dfrac{-4 . 16}{27 . 16} = \\dfrac{-64}{432}$ <br\/> $\\dfrac{9}{16} = \\dfrac{9 . 27}{16 . 27} = \\dfrac{243}{432}$ <br\/> $\\dfrac{-5}{6} = \\dfrac{-5 . 72}{6 . 72} = \\dfrac{-360}{432}$ <br\/> <span class='basic_pink'> V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 243; 432 <\/span> "}]}]},"correct":"","level":"2","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:52"}]}