{"common":{"save":0,"post_id":"814","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1811","post_id":"814","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":"$\\dfrac{2}{7}$ c\u1ee7a 35 l\u00e0: ","select":["A. 5 ","B. 10","C. 70","D. 15 "],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> PH\u01af\u01a0NG PH\u00c1P T\u00ccM GI\u00c1 TR\u1eca PH\u00c2N S\u1ed0 C\u1ee6A M\u1ed8T S\u1ed0 CHO TR\u01af\u1edaC <br\/> Mu\u1ed1n t\u00ecm $\\dfrac{m}{n}$ c\u1ee7a s\u1ed1 b cho tr\u01b0\u1edbc, ta t\u00ednh $b . \\dfrac{m}{n}$ ($m, n \\in \\mathbb{N}, n \\neq 0$) <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{2}{7}$ c\u1ee7a 35 l\u00e0: $\\dfrac{2}{7} . 35 = 10$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. 10 <\/span> ","column":4}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:55"},{"id":"1812","post_id":"814","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":[[3]],"list":[{"point":5,"ques":"$\\dfrac{4}{5}$ c\u1ee7a 60cm l\u00e0: ","select":["A. 12cm ","B. 15cm","C. 48cm","D. 36cm "],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> PH\u01af\u01a0NG PH\u00c1P T\u00ccM GI\u00c1 TR\u1eca PH\u00c2N S\u1ed0 C\u1ee6A M\u1ed8T S\u1ed0 CHO TR\u01af\u1edaC <br\/> Mu\u1ed1n t\u00ecm $\\dfrac{m}{n}$ c\u1ee7a s\u1ed1 b cho tr\u01b0\u1edbc, ta t\u00ednh $b . \\dfrac{m}{n}$ ($m, n \\in \\mathbb{N}, n \\neq 0$) <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{4}{5}$ c\u1ee7a 60cm l\u00e0: $\\dfrac{4}{5} . 60cm = 48cm$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. 48cm <\/span> ","column":4}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:55"},{"id":"1813","post_id":"814","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":[[1]],"list":[{"point":5,"ques":" H\u00e3y so s\u00e1nh 48% c\u1ee7a 25 v\u00e0 25% c\u1ee7a 48. <br\/> \u0110\u00e1p \u00e1n l\u00e0: ","select":["A. 48% c\u1ee7a 25 = 25% c\u1ee7a 48 ","B. 48% c\u1ee7a 25 > 25% c\u1ee7a 48","C. 48% c\u1ee7a 25 < 25% c\u1ee7a 48"],"hint":"Vi\u1ebft 48% v\u00e0 25% d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i t\u00ecm gi\u00e1 tr\u1ecb ph\u00e2n s\u1ed1","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $48\\% = \\dfrac{48}{100}$; $25 \\% = \\dfrac{25}{100}$ <br\/> 48% c\u1ee7a 25 l\u00e0: $\\dfrac{48}{100} . 25 = \\dfrac{48 . 25}{100} = 12$ (1) <br\/> 25% c\u1ee7a 48 l\u00e0: $\\dfrac{25}{100} . 48 = \\dfrac{25 . 48}{100} = 12$ (2) <br\/> T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ 48% c\u1ee7a 25 = 25% c\u1ee7a 48 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> <br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: Ta c\u00f3 a% c\u1ee7a b = b% c\u1ee7a a v\u00ec $\\dfrac{a}{100} . b = \\dfrac{a . b}{100} = \\dfrac{b}{100} . a $","column":1}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:55"}]}