{"common":{"save":0,"post_id":"812","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1741","post_id":"812","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":[[["2"]]],"list":[{"point":10,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c. <br\/> $\\left( 17 \\dfrac{3535}{88375} - 16\\dfrac{1001}{1365} \\right) . 3\\dfrac{6}{23} + 3\\dfrac{6}{23} : \\left( 5 - 1\\dfrac{187}{253} \\right) $ = _input_ ","hint":"R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh","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 \u0111\u1ebfn t\u1ed1i gi\u1ea3n <br\/> <b> B\u01b0\u1edbc 2: <\/b> Th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh l\u1ea7n l\u01b0\u1ee3t theo th\u1ee9 t\u1ef1 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} & \\left( 17 \\dfrac{3535}{88375} - 16\\dfrac{1001}{1365} \\right) . 3\\dfrac{6}{23} + 3\\dfrac{6}{23} : \\left( 5 - 1\\dfrac{187}{253} \\right) \\\\ & = \\left( 17\\dfrac{1}{25} - 16\\dfrac{11}{15} \\right) . 3\\dfrac{6}{23} + 3\\dfrac{6}{23} : \\left(5 - 1\\dfrac{17}{23} \\right) \\\\ &= \\left( 17\\dfrac{3}{75} - 16\\dfrac{55}{75} \\right) . 3\\dfrac{6}{23} + 3\\dfrac{6}{23} : \\left( 4\\dfrac{23}{23} - 1\\dfrac{17}{23} \\right) \\\\ &= \\left( 16\\dfrac{78}{75} - 16\\dfrac{55}{75} \\right) . 3\\dfrac{6}{23} + 3\\dfrac{6}{23} : 3\\dfrac{6}{23} \\\\ &= \\dfrac{23}{75} . \\dfrac{75}{23} + 1 \\\\ &= 1 + 1 = 2 \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: C\u1ea7n r\u00fat g\u1ecdn c\u00e1c ph\u00e2n s\u1ed1 \u0111\u1ebfn t\u1ed1i gi\u1ea3n r\u1ed3i m\u1edbi th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh <br\/> \u1ede b\u00e0i n\u00e0y h\u1ecdc sinh hay m\u1eafc sai l\u1ea7m l\u00e0 nh\u00f3m $3\\dfrac{6}{23}$ l\u00e0m nh\u00e2n t\u1eed chung nh\u01b0ng vi\u1ec7c l\u00e0m n\u00e0y l\u00e0 kh\u00f4ng \u0111\u00fang v\u00ec \u1edf s\u1ed1 h\u1ea1ng th\u1ee9 nh\u1ea5t ta c\u00f3 $\\left( 17 \\dfrac{3535}{88375} - 16\\dfrac{1001}{1365} \\right) . 3\\dfrac{6}{23}$, c\u00f2n \u1edf s\u1ed1 h\u1ea1ng th\u1ee9 2 c\u00f3 $3\\dfrac{6}{23} : \\left( 5 - 1\\dfrac{187}{253} \\right)$ t\u1ee9c l\u00e0 vai tr\u00f2 c\u1ee7a $3\\dfrac{6}{23}$ kh\u00f4ng gi\u1ed1ng nhau n\u00ean ta kh\u00f4ng \u0111\u1eb7t ra ngo\u00e0i l\u00e0m nh\u00e2n t\u1eed chung \u0111\u01b0\u1ee3c <\/i> <\/span> "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"},{"id":"1742","post_id":"812","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":[[["2"],["1"],["3"]]],"list":[{"point":10,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c. <br\/> $\\dfrac{1,6 : \\left( 1\\dfrac{3}{5} . 1,25\\right) }{0,64 - \\dfrac{1}{25}} + \\dfrac{ \\left( 1,08 - \\dfrac{2}{25} \\right) : \\dfrac{4}{7}}{\\left( 5\\dfrac{5}{9} - 2\\dfrac{1}{4} \\right) . 2\\dfrac{2}{17}} + (0,6 . 0,5) : \\dfrac{2}{5} $ = _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft $1\\dfrac{3}{5} = 1,6$; $\\dfrac{2}{25} = 0,08$; $\\dfrac{1}{25} = 0,04$; $\\dfrac{2}{5} = 0,4$ ","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} &\\dfrac{1,6 : \\left( 1\\dfrac{3}{5} . 1,25\\right) }{0,64 - \\dfrac{1}{25}} + \\dfrac{ \\left( 1,08 - \\dfrac{2}{25} \\right) : \\dfrac{4}{7}}{\\left( 5\\dfrac{5}{9} - 2\\dfrac{1}{4} \\right) . 2\\dfrac{2}{17}} + (0,6 . 0,5) : \\dfrac{2}{5} \\\\ &= \\dfrac{1,6 : \\left( \\dfrac{8}{5} . 1,25 \\right)}{0,64 - 0,04} + \\dfrac{ \\left(1,08 - 0,08 \\right) : \\dfrac{4}{7}}{ \\left( \\dfrac{50}{9} - \\dfrac{9}{4} \\right) . \\dfrac{36}{17}} + (0,6 . 0,5) : 0,4 \\\\ &= \\dfrac{1,6 : (1,6 . 1,25)}{0,6} + \\dfrac{ 1 : \\dfrac{4}{7}}{\\left( \\dfrac{200}{36} - \\dfrac{81}{36} \\right) . \\dfrac{36}{17}} + 0,3 : 0,4 \\\\ &= \\dfrac{1,6 : 2}{0,6} + \\dfrac{\\dfrac{7}{4}}{\\dfrac{119}{36} . \\dfrac{36}{17}} + \\dfrac{0,3}{0,4} \\\\ &= \\dfrac{0,8}{0,6} + \\dfrac{7}{4} . \\dfrac{17}{119} + \\dfrac{3}{4} \\\\ &= \\dfrac{4}{3} + \\dfrac{1}{4} + \\dfrac{3}{4} \\\\ &= \\dfrac{4}{3} + 1 \\\\ &= 2\\dfrac{1}{3} \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: V\u1edbi nh\u1eefng b\u00e0i t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c, ch\u00fang ta c\u1ea7n quan s\u00e1t k\u0129 tr\u01b0\u1edbc khi bi\u1ebfn \u0111\u1ed5i: C\u00f3 nh\u1eefng b\u00e0i ch\u00fang ta chuy\u1ec3n t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 ra ph\u00e2n s\u1ed1, s\u1ed1 th\u1eadp ph\u00e2n ho\u1eb7c h\u1ed7n s\u1ed1 \u0111\u1ec3 t\u00ednh. C\u00f3 nh\u1eefng b\u00e0i ch\u00fang ta nh\u00f3m c\u00e1c ph\u00e2n s\u1ed1 v\u1edbi nhau, c\u00e1c h\u1ed7n s\u1ed1 v\u1edbi nhau, c\u00e1c s\u1ed1 th\u1eadp ph\u00e2n v\u1edbi nhau \u0111\u1ec3 t\u00ednh, vi\u1ec7c n\u00e0y gi\u00fap cho vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n <\/i> <\/span> "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"},{"id":"1743","post_id":"812","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":[[["247"],["44"]]],"list":[{"point":10,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ecm x bi\u1ebft: <br\/><br\/> $0,875 . \\left( \\dfrac{6}{5}x - \\dfrac{13}{2} \\right) = \\dfrac{1}{2}x - 2,6$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: $x$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft c\u00e1c s\u1ed1 th\u1eadp ph\u00e2n d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i bi\u1ebfn \u0111\u1ed5i v\u00e0 t\u00ecm x ","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft c\u00e1c s\u1ed1 th\u1eadp ph\u00e2n d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Nh\u00e2n ph\u00e1 ngo\u1eb7c \u1edf v\u1ebf tr\u00e1i <br\/> <b> B\u01b0\u1edbc 3: <\/b> Chuy\u1ec3n $\\dfrac{1}{2}x$ sang v\u1ebf tr\u00e1i v\u00e0 c\u00e1c s\u1ed1 h\u1ea1ng kh\u00f4ng ch\u1ee9a x sang v\u1ebf ph\u1ea3i <br\/> <b> B\u01b0\u1edbc 4: <\/b> Bi\u1ebfn \u0111\u1ed5i v\u00e0 t\u00ecm x <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} 0,875 . \\left( \\dfrac{6}{5}x - \\dfrac{13}{2} \\right) &= \\dfrac{1}{2}x - 2,6 \\\\ \\dfrac{875}{1000} . \\left( \\dfrac{6}{5}x - \\dfrac{13}{2} \\right) &= \\dfrac{1}{2}x - \\dfrac{26}{10} \\\\ \\dfrac{7}{8} . \\left( \\dfrac{6}{5}x - \\dfrac{13}{2} \\right) &= \\dfrac{1}{2}x - \\dfrac{13}{5} \\\\ \\dfrac{21}{20}x - \\dfrac{91}{16} &= \\dfrac{1}{2}x - \\dfrac{13}{5} \\\\ \\dfrac{21}{20}x - \\dfrac{1}{2}x &= \\dfrac{91}{16} - \\dfrac{13}{5} \\\\ \\dfrac{11}{20}x &= \\dfrac{247}{80} \\\\ x &= \\dfrac{247}{44} \\end{align*} $ "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:54"}]}