{"segment":[{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["10"],["2"],["17"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c b\u1eb1ng c\u00e1ch h\u1ee3p l\u00fd: <br\/> $17\\dfrac{2}{31} - \\left( \\dfrac{15}{17} + 6\\dfrac{2}{31} \\right)$ = _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u1ecf ngo\u1eb7c v\u00e0 nh\u00f3m hai h\u1ed7n s\u1ed1 c\u00f3 ph\u1ea7n ph\u00e2n s\u1ed1 c\u00f9ng m\u1eabu r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} 17\\dfrac{2}{31} - \\left( \\dfrac{15}{17} + 6\\dfrac{2}{31} \\right) &= 17 \\dfrac{2}{31} - \\dfrac{15}{17} - 6\\dfrac{2}{31} \\\\ &= \\left( 17 \\dfrac{2}{31} - 6 \\dfrac{2}{31} \\right) - \\dfrac{15}{17} \\\\ &= 11 - \\dfrac{15}{17} \\\\ &= 10\\dfrac{17}{17} - \\dfrac{15}{17} \\\\ &= 10 \\dfrac{2}{17} \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: M\u1ed9t s\u1ed1 nguy\u00ean c\u0169ng c\u00f3 th\u1ec3 vi\u1ebft d\u01b0\u1edbi d\u1ea1ng h\u1ed7n s\u1ed1. V\u00ed d\u1ee5 \u1edf tr\u00ean ta \u0111\u00e3 vi\u1ebft $11 = 10\\dfrac{17}{17}$ \u0111\u1ec3 th\u1ef1c hi\u1ec7n tr\u1eeb h\u1ed7n s\u1ed1 <br\/> \u0110\u1eb7c bi\u1ec7t l\u01b0u \u00fd: Khi th\u1ef1c hi\u1ec7n tr\u1eeb h\u1ed7n s\u1ed1 ch\u1eb3ng h\u1ea1n $17 \\dfrac{2}{31} - 6 \\dfrac{2}{31}$ h\u1ecdc sinh hay m\u1eafc sai l\u1ea7m l\u00e0 l\u1ea5y 17 - 6 = 11; $\\dfrac{2}{31} - \\dfrac{2}{31} = 0$ n\u00ean $17 \\dfrac{2}{31} - 6 \\dfrac{2}{31} = 11 . 0 = 0$ <\/i> <\/span> "}]}],"id_ques":1721},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["15"],["39"],["248"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c b\u1eb1ng c\u00e1ch h\u1ee3p l\u00fd: <br\/> $\\left( 17 \\dfrac{29}{31} - 3 \\dfrac{7}{8} \\right) - \\left( 2 \\dfrac{28}{31} - 4 \\right) $ = _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u1ecf ngo\u1eb7c v\u00e0 nh\u00f3m hai h\u1ed7n s\u1ed1 c\u00f3 ph\u1ea7n ph\u00e2n s\u1ed1 c\u00f9ng m\u1eabu r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} \\left( 17 \\dfrac{29}{31} - 3 \\dfrac{7}{8} \\right) - \\left( 2 \\dfrac{28}{31} - 4 \\right) &= 17 \\dfrac{29}{31} - 3 \\dfrac{7}{8} - 2 \\dfrac{28}{31} + 4 \\\\ &= \\left( 17 \\dfrac{29}{31} - 2 \\dfrac{28}{31} \\right) + \\left( 4 - 3 \\dfrac{7}{8} \\right) \\\\ &= 15 \\dfrac{1}{31} + \\left( 3 \\dfrac{8}{8} - 3 \\dfrac{7}{8} \\right) \\\\ &= \\dfrac{466}{31} + \\dfrac{1}{8} \\\\ &= 15\\dfrac{39}{248} \\end{align*} $"}]}],"id_ques":1722},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["12"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c b\u1eb1ng c\u00e1ch h\u1ee3p l\u00fd: <br\/> $\\left( 3 \\dfrac{2}{9} . \\dfrac{15}{23} . 1 \\dfrac{7}{29} \\right) : \\dfrac{5}{23} $ = _input_ ","hint":"Nh\u00f3m c\u00e1c ph\u00e2n s\u1ed1 ho\u1eb7c h\u1ed7n s\u1ed1 \u0111\u1ec3 khi nh\u00e2n hay chia \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0 s\u1ed1 nguy\u00ean","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> B\u1ecf ngo\u1eb7c v\u00e0 nh\u00f3m hai h\u1ed7n s\u1ed1 c\u00f3 ph\u1ea7n ph\u00e2n s\u1ed1 c\u00f9ng m\u1eabu r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} \\left( 3 \\dfrac{2}{9} . \\dfrac{15}{23} . 1 \\dfrac{7}{29} \\right) : \\dfrac{5}{23} &= 3\\dfrac{2}{9} . \\dfrac{15}{23} . 1 \\dfrac{7}{29} : \\dfrac{5}{23} \\\\ &= \\left( \\dfrac{29}{9} . \\dfrac{36}{29} \\right) . \\left( \\dfrac{15}{23} : \\dfrac{5}{23} \\right) \\\\ &= 4 . 3 = 12 \\end{align*} $"}]}],"id_ques":1723},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["3"],["5"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"T\u00ecm x bi\u1ebft:<br\/> <br\/> $\\left( 4 \\dfrac{46}{65} + x \\right) . 1 \\dfrac{1}{12} = 5,75$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: x = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"\u0110\u1ed5i 5,75 ra ph\u00e2n s\u1ed1 r\u1ed3i 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> \u0110\u1ed5i 5,75 ra ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Coi $\\left( 4 \\dfrac{46}{65} + x \\right)$ l\u00e0 th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft l\u1ea5y t\u00edch chia cho th\u1eeba s\u1ed1 \u0111\u00e3 bi\u1ebft <br\/> <b> B\u01b0\u1edbc 3: <\/b> Coi x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} \\left( 4 \\dfrac{46}{65} + x \\right) . 1 \\dfrac{1}{12} &= 5,75 \\\\ \\left( 4 \\dfrac{46}{65} + x \\right) . 1 \\dfrac{1}{12} & = \\dfrac{23}{4} \\\\ 4\\dfrac{46}{65} + x &= \\dfrac{23}{4} : 1\\dfrac{1}{12} \\\\ 4\\dfrac{46}{65} + x &= \\dfrac{23}{4} . \\dfrac{12}{13} \\\\ 4 \\dfrac{46}{65} + x &= 5\\dfrac{4}{13} \\\\ x &= 5 \\dfrac{4}{13} - 4 \\dfrac{46}{65} \\\\ x &= 5 \\dfrac{20}{65} - 4\\dfrac{46}{65} \\\\ x &= 4\\dfrac{85}{65} - 4\\dfrac{46}{65} \\\\ x &= \\dfrac{3}{5} \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: Khi th\u1ef1c hi\u1ec7n tr\u1eeb hai h\u1ed7n s\u1ed1, n\u1ebfu ph\u1ea7n ph\u00e2n s\u1ed1 \u1edf s\u1ed1 b\u1ecb tr\u1eeb nh\u1ecf h\u01a1n ph\u1ea7n ph\u00e2n s\u1ed1 \u1edf s\u1ed1 tr\u1eeb, ta ph\u1ea3i r\u00fat 1 \u0111\u01a1n v\u1ecb t\u1eeb ph\u1ea7n nguy\u00ean c\u1ee7a s\u1ed1 b\u1ecb tr\u1eeb \u0111\u1ec3 th\u00eam v\u00e0o ph\u1ea7n ph\u00e2n s\u1ed1 r\u1ed3i ti\u1ebfp t\u1ee5c tr\u1eeb nh\u01b0 tr\u00ean <\/i><\/span> "}]}],"id_ques":1724},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["1"],["1"],["19"]]],"list":[{"point":5,"width":50,"ques":"T\u00ecm x bi\u1ebft:<br\/> <br\/> $\\left( 2\\dfrac{3}{4} - 1 \\dfrac{4}{5} \\right) . x = 1$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: x = _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $\\left( 2\\dfrac{3}{4} - 1 \\dfrac{4}{5} \\right)$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Coi x l\u00e0 th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft l\u1ea5y t\u00edch chia cho th\u1eeba s\u1ed1 \u0111\u00e3 bi\u1ebft <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} \\left( 2\\dfrac{3}{4} - 1 \\dfrac{4}{5} \\right) . x &= 1 \\\\ \\left( \\dfrac{11}{4} - \\dfrac{9}{5} \\right) . x &= 1 \\\\ \\left( \\dfrac{55}{20} - \\dfrac{36}{20} \\right) . x &= 1 \\\\ \\dfrac{19}{20} . x &= 1 \\\\ x &= 1 : \\dfrac{19}{20} \\\\ x &= 1\\dfrac{1}{19} \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: N\u00ean \u0111\u1ed5i k\u1ebft qu\u1ea3 ra h\u1ed7n s\u1ed1 n\u1ebfu c\u00f3 th\u1ec3 <\/i><\/span> "}]}],"id_ques":1725},{"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":"Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c $10,42 : \\left( 21,34 - \\dfrac{1}{2} \\right) + \\dfrac{2}{3} . 0,75$ l\u00e0: ","select":["A. $\\dfrac{1}{2}$ ","B. $0,25$ ","C. $1$","D. $2,5$ "],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft $\\dfrac{1}{2}$ th\u00e0nh s\u1ed1 th\u1eadp ph\u00e2n b\u1eb1ng c\u00e1ch l\u1ea5y 1 chia 2 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $\\dfrac{2}{3} . 0,75$ <br\/> <b> B\u01b0\u1edbc 3: <\/b> Th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh v\u1edbi s\u1ed1 th\u1eadp ph\u00e2n nh\u01b0 b\u00ecnh th\u01b0\u1eddng <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> $\\begin{align*} 10,42 : \\left( 21,34 - \\dfrac{1}{2} \\right) + \\dfrac{2}{3} . 0,75 &= 10,42 : \\left( 21,34 - 0,5 \\right) + 0,5 \\\\ &= 10,42 : 20,84 + 0,5 \\\\ &= 0,5 + 0,5 \\\\ &= 1 \\end{align*}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $1$ <\/span> ","column":4}]}],"id_ques":1726},{"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":"Gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c $7 \\dfrac{8}{15} + 11 \\dfrac{5}{6} + 6 \\dfrac{1}{2} - 5 \\dfrac{4}{9} $ l\u00e0: ","select":["A. $20\\dfrac{19}{45}$ ","B. $19 \\dfrac{38}{90}$ ","C. $19 \\dfrac{19}{45}$","D. $19 \\dfrac{1}{9}$ "],"hint":"Quy \u0111\u1ed3ng c\u00e1c ph\u1ea7n ph\u00e2n s\u1ed1 r\u1ed3i th\u1ef1c hi\u1ec7n c\u1ed9ng, tr\u1eeb c\u00e1c h\u1ed7n s\u1ed1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Quy \u0111\u1ed3ng c\u00e1c ph\u1ea7n ph\u00e2n s\u1ed1 c\u1ee7a c\u00e1c h\u1ed7n s\u1ed1 tr\u00ean <br\/> <b> B\u01b0\u1edbc 2: <\/b> Th\u1ef1c hi\u1ec7n c\u1ed9ng tr\u1eeb c\u00e1c h\u1ed7n s\u1ed1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> $\\begin{align*} & 7 \\dfrac{8}{15} + 11 \\dfrac{5}{6} + 6 \\dfrac{1}{2} - 5 \\dfrac{4}{9} \\\\ &= 7 \\dfrac{48}{90} + 11 \\dfrac{75}{90} + 6 \\dfrac{45}{90} - 5 \\dfrac{40}{90} \\\\ &= 25 \\dfrac{78}{90} - 5 \\dfrac{40}{90} \\\\ &= 20 \\dfrac{19}{45} \\end{align*}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. $20\\dfrac{19}{45} $ <\/span> ","column":4}]}],"id_ques":1727},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" H\u00e3y ch\u1ecdn nh\u00f3m c\u00e1c ph\u00e2n s\u1ed1 \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n: ","select":["A. $\\dfrac{46}{9}; \\dfrac{34}{7}; \\dfrac{56}{11}$ ","B. $\\dfrac{34}{7}; \\dfrac{46}{9}; \\dfrac{56}{11} $ ","C. $\\dfrac{56}{11}; \\dfrac{46}{9}; \\dfrac{34}{7} $","D. $\\dfrac{34}{7}; \\dfrac{56}{11}; \\dfrac{46}{9} $ "],"hint":"Vi\u1ebft m\u1ed7i ph\u00e2n s\u1ed1 tr\u00ean th\u00e0nh h\u1ed7n s\u1ed1 r\u1ed3i so s\u00e1nh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft m\u1ed7i ph\u00e2n s\u1ed1 tr\u00ean th\u00e0nh h\u1ed7n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh c\u00e1c ph\u1ea7n nguy\u00ean c\u1ee7a m\u1ed7i h\u1ed7n s\u1ed1 tr\u00ean <br\/> N\u1ebfu h\u1ed7n s\u1ed1 n\u00e0o c\u00f3 ph\u1ea7n nguy\u00ean b\u1eb1ng nhau th\u00ec so s\u00e1nh \u0111\u1ebfn ph\u1ea7n ph\u00e2n s\u1ed1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{46}{9} = 5\\dfrac{1}{9}$ <br\/> $\\dfrac{34}{7} = 4 \\dfrac{6}{7}$ <br\/> $\\dfrac{56}{11} = 5 \\dfrac{1}{11}$ <br\/> V\u00ec $\\dfrac{1}{9} > \\dfrac{1}{11}$ n\u00ean $5 \\dfrac{1}{9} > 5 \\dfrac{1}{11}$ <br\/> N\u00ean: $4 \\dfrac{6}{7} < 5 \\dfrac{1}{11} < 5 \\dfrac{1}{9}$ <br\/> $\\Rightarrow$ $\\dfrac{34}{7} < \\dfrac{56}{11} < \\dfrac{46}{9}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":1728},{"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":" H\u00e3y ch\u1ecdn nh\u00f3m c\u00e1c ph\u00e2n s\u1ed1 \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n: ","select":["A. $\\dfrac{23}{5}; \\dfrac{47}{12}; \\dfrac{19}{4}$ ","B. $\\dfrac{47}{12}; \\dfrac{23}{5}; \\dfrac{19}{4} $ ","C. $\\dfrac{19}{4}; \\dfrac{23}{5}; \\dfrac{47}{12} $","D. $\\dfrac{47}{12}; \\dfrac{19}{4}; \\dfrac{23}{5} $ "],"hint":"Vi\u1ebft m\u1ed7i ph\u00e2n s\u1ed1 tr\u00ean th\u00e0nh h\u1ed7n s\u1ed1 r\u1ed3i so s\u00e1nh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft m\u1ed7i ph\u00e2n s\u1ed1 tr\u00ean th\u00e0nh h\u1ed7n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh c\u00e1c ph\u1ea7n nguy\u00ean c\u1ee7a m\u1ed7i h\u1ed7n s\u1ed1 tr\u00ean <br\/> N\u1ebfu h\u1ed7n s\u1ed1 n\u00e0o c\u00f3 ph\u1ea7n nguy\u00ean b\u1eb1ng nhau th\u00ec so s\u00e1nh \u0111\u1ebfn ph\u1ea7n ph\u00e2n s\u1ed1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{23}{5} = 4\\dfrac{3}{5}$ <br\/> $\\dfrac{47}{12} = 3 \\dfrac{11}{12}$ <br\/> $\\dfrac{19}{4} = 4 \\dfrac{3}{4}$ <br\/> V\u00ec $\\dfrac{3}{5} < \\dfrac{3}{4}$ n\u00ean $4 \\dfrac{3}{5} < 4 \\dfrac{3}{4}$ <br\/> N\u00ean: $3 \\dfrac{11}{12} < 4 \\dfrac{3}{5} < 4 \\dfrac{3}{4}$ <br\/> $\\Rightarrow$ $\\dfrac{47}{12} < \\dfrac{23}{5} < \\dfrac{19}{4}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> ","column":2}]}],"id_ques":1729},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["3"],["7"],["31"]]],"list":[{"point":5,"width":50,"ques":" S\u1ed1 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a 0,31 l\u00e0: _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft 0,31 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i t\u00ecm ngh\u1ecbch \u0111\u1ea3o","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft s\u1ed1 0,31 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm s\u1ed1 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a ph\u00e2n s\u1ed1 v\u1eeba vi\u1ebft <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $0,31 = \\dfrac{31}{100}$ <br\/> Ngh\u1ecbch \u0111\u1ea3o c\u1ee7a $\\dfrac{31}{100}$ l\u00e0 $\\dfrac{100}{31} = 3 \\dfrac{7}{31}$"}]}],"id_ques":1730},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["14"],["2"],["7"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":" S\u1ed1 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a 0,07 l\u00e0: _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft 0,07 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i t\u00ecm ngh\u1ecbch \u0111\u1ea3o","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft s\u1ed1 0,07 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm s\u1ed1 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a ph\u00e2n s\u1ed1 v\u1eeba vi\u1ebft <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $0,07 = \\dfrac{7}{100}$ <br\/> Ngh\u1ecbch \u0111\u1ea3o c\u1ee7a $\\dfrac{7}{100}$ l\u00e0 $\\dfrac{100}{7} = 14 \\dfrac{2}{7}$"}]}],"id_ques":1731},{"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"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" M\u1ed9t ng\u01b0\u1eddi \u0111i xe m\u00e1y t\u1eeb A \u0111\u1ebfn B v\u1edbi v\u1eadn t\u1ed1c $26 \\dfrac{1}{4}$km\/h h\u1ebft 2,4 gi\u1edd. L\u00fac v\u1ec1 ng\u01b0\u1eddi \u1ea5y \u0111i v\u1edbi v\u1eadn t\u1ed1c 30km\/h. T\u00ednh th\u1eddi gian ng\u01b0\u1eddi \u0111\u00f3 \u0111i t\u1eeb B \u0111\u1ebfn A? <br\/> \u0110\u00e1p s\u1ed1: _input_ gi\u1edd <br\/> (Vi\u1ebft \u0111\u00e1p \u00e1n \u0111\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n)","hint":"Vi\u1ebft s\u1ed1 \u0111o v\u1eadn t\u1ed1c l\u00fac \u0111i d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n r\u1ed3i t\u00ednh","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft s\u1ed1 \u0111o v\u1eadn t\u1ed1c l\u00fac \u0111i d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n r\u1ed3i t\u00ednh qu\u00e3ng \u0111\u01b0\u1eddng AB <br\/> Qu\u00e3ng \u0111\u01b0\u1eddng = V\u1eadn t\u1ed1c . Th\u1eddi gian <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh th\u1eddi gian \u0111i t\u1eeb B \u0111\u1ebfn A <br\/> Th\u1eddi gian = Qu\u00e3ng \u0111\u01b0\u1eddng : V\u1eadn t\u1ed1c <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: $26 \\dfrac{1}{4} = 26,25$ <br\/> Qu\u00e3ng \u0111\u01b0\u1eddng AB d\u00e0i l\u00e0: <br\/> 26,25 . 2,4 = 63 (km) <br\/> Th\u1eddi gian ng\u01b0\u1eddi \u0111\u00f3 \u0111i t\u1eeb B v\u1ec1 A l\u00e0: <br\/> 63 : 30 = 2,1 (gi\u1edd) <br\/> \u0110\u00e1p s\u1ed1: 2,1 gi\u1edd <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 2,1 gi\u1edd <\/span> "}]}],"id_ques":1732},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["-505"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"T\u00ednh. <br\/> <br\/> $21 \\% - 17,5 + 29 \\% + 11,95$ = _input_ % ","hint":"Vi\u1ebft 17,5 v\u00e0 11,95 d\u01b0\u1edbi d\u1ea1ng k\u00ed hi\u1ec7u %","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} &21 \\% - 17,5 + 29 \\% + 11,95 \\\\ &= 21 \\% - \\dfrac{175}{10} + 29 \\% + \\dfrac{1195}{100} \\\\ &= 21 \\% - \\dfrac{1750}{100} + 29 \\% + \\dfrac{1195}{100} \\\\ &= 21 \\% - 1750 \\% + 29 \\% + 1195 \\% \\\\ &= \\left( 21 \\% + 29 \\% + 1195 \\% \\right) - 1750 \\% \\\\ &= 1245 \\% - 1750 \\% \\\\ &= -505 \\% \\end{align*}$ <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: -505% <\/span> "}]}],"id_ques":1733},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["-13"],["10"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":" T\u00ednh. <br\/><br\/> $3 \\dfrac{2}{3} : \\left( 1,5 - 2 \\dfrac{1}{3} \\right) - 0,75 . \\left( \\dfrac{-4}{3} - 2,8 \\right)$ = <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 t\u00ednh ","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 v\u00e0 h\u1ed7n s\u1ed1 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh trong ngo\u1eb7c () tr\u01b0\u1edbc sau \u0111\u00f3 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh theo th\u1ee9 t\u1ef1 nh\u00e2n chia tr\u01b0\u1edbc, c\u1ed9ng tr\u1eeb sau <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $ \\begin{align*} & 3 \\dfrac{2}{3} : \\left( 1,5 - 2 \\dfrac{1}{3} \\right) - 0,75 . \\left( \\dfrac{-4}{3} - 2,8 \\right) \\\\ &= \\dfrac{11}{3} : \\left( \\dfrac{15}{10} - \\dfrac{7}{3} \\right) - \\dfrac{75}{100} . \\left( \\dfrac{-4}{3} - \\dfrac{28}{10} \\right) \\\\ &= \\dfrac{11}{3} : \\left( \\dfrac{3}{2} - \\dfrac{7}{3} \\right) - \\dfrac{3}{4} . \\left( \\dfrac{-4}{3} - \\dfrac{14}{5} \\right) \\\\ &= \\dfrac{11}{3} : \\left( \\dfrac{9}{6} - \\dfrac{14}{6} \\right) - \\dfrac{3}{4} . \\left( \\dfrac{-20}{15} - \\dfrac{42}{15} \\right) \\\\ &= \\dfrac{11}{3} : \\dfrac{-5}{6} - \\dfrac{3}{4} . \\dfrac{-62}{15} \\\\ &= \\dfrac{11}{3} . \\dfrac{-6}{5} - \\dfrac{3 . (-62)}{4 . 15} \\\\ &= \\dfrac{-22}{5} - \\dfrac{-31}{10} \\\\ &= \\dfrac{-44}{10} + \\dfrac{31}{10} \\\\ & = \\dfrac{-13}{10} \\end{align*} $<br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: V\u1edbi nh\u1eefng b\u00e0i t\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c m\u00e0 trong bi\u1ec3u th\u1ee9c c\u00f3 c\u1ea3 h\u1ed7n s\u1ed1, s\u1ed1 th\u1eadp ph\u00e2n, ph\u1ea7n tr\u0103m th\u00f4ng th\u01b0\u1eddng ta vi\u1ebft h\u1ebft d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh <\/i> <\/span> "}]}],"id_ques":1734},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["-203"],["25"]]],"list":[{"point":5,"width":50,"ques":" T\u00ednh. <br\/><br\/> $60 \\% : 1\\dfrac{1}{2} - 3\\dfrac{3}{4} : 50 \\% - 1,2 . 85 \\% $ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft c\u00e1c h\u1ed7n s\u1ed1 v\u00e0 % d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh ","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $ \\begin{align*} & 60 \\% : 1\\dfrac{1}{2} - 3\\dfrac{3}{4} : 50 \\% - 1,2 . 85 \\% \\\\ &= \\dfrac{60}{100} : \\dfrac{3}{2} - \\dfrac{15}{4} : \\dfrac{50}{100} - \\dfrac{12}{10} . \\dfrac{85}{100} \\\\ &= \\dfrac{3}{5} . \\dfrac{2}{3} - \\dfrac{15}{4} : \\dfrac{1}{2} - \\dfrac{6}{5} . \\dfrac{17}{20} \\\\ &= \\dfrac{2}{5} - \\dfrac{15}{4} . 2 - \\dfrac{6}{5} . \\dfrac{17}{20} \\\\ &= \\dfrac{2}{5} - \\dfrac{15}{2} - \\dfrac{51}{50} \\\\ &= \\dfrac{20}{50} - \\dfrac{375}{50} - \\dfrac{51}{50} \\\\ &= \\dfrac{-203}{25} = -8\\dfrac{3}{25} \\end{align*} $"}]}],"id_ques":1735},{"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":" C\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean n l\u1edbn h\u01a1n $\\dfrac{255}{23}$ v\u00e0 nh\u1ecf h\u01a1n $\\dfrac{438}{29}$ l\u00e0: ","select":["A. $n \\in \\left\\{ 11; 12; 13; 14 \\right\\}$ ","B. $n \\in \\left\\{ 12, 13, 14 \\right\\}$ ","C. $n \\in \\left\\{ 12, 13, 14, 15 \\right\\}$ ","D. $n \\in \\left\\{ 11; 15 \\right\\}$ "],"hint":"Vi\u1ebft hai ph\u00e2n s\u1ed1 tr\u00ean ra h\u1ed7n s\u1ed1 r\u1ed3i t\u00ecm n","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft $\\dfrac{255}{23}$; $\\dfrac{438}{29}$ d\u01b0\u1edbi d\u1ea1ng h\u1ed7n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean n th\u1ecfa m\u00e3n $\\dfrac{255}{23} < n < \\dfrac{438}{29}$ <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{255}{23} = 11\\dfrac{2}{23}$ <br\/> $\\dfrac{438}{29} = 15\\dfrac{3}{29}$ <br\/> Theo \u0111\u1ec1 b\u00e0i: $\\dfrac{255}{23} < n < \\dfrac{438}{29}$ <br\/> $11 \\dfrac{2}{23} < n < 15 \\dfrac{3}{29}$ <br\/> V\u00ec $11\\dfrac{2}{23} < \\dfrac{276}{23} = 12$; $15 = \\dfrac{435}{29} < 15\\dfrac{3}{29}$ <br\/> $\\Rightarrow$ $12 \\leq n \\leq 15$ <br\/> $\\Rightarrow$ $n \\in \\left\\{ 12, 13, 14; 15 \\right\\}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":2}]}],"id_ques":1736},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" C\u00e1c s\u1ed1 t\u1ef1 nguy\u00ean n l\u1edbn h\u01a1n $\\dfrac{-191}{14}$ v\u00e0 nh\u1ecf h\u01a1n $\\dfrac{-125}{12}$ l\u00e0: ","select":["A. $n \\in \\left\\{-14, -13, -12 \\right\\}$ ","B. $n \\in \\left\\{ -13, -12, -11, -10 \\right\\}$ ","C. $n \\in \\left\\{ -16, -15, -14 \\right\\}$ ","D. $n \\in \\left\\{ -13, -12, -11 \\right\\}$ "],"hint":"Vi\u1ebft hai ph\u00e2n s\u1ed1 tr\u00ean ra h\u1ed7n s\u1ed1 r\u1ed3i t\u00ecm n","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft $\\dfrac{-191}{14}$; $\\dfrac{-125}{12}$ d\u01b0\u1edbi d\u1ea1ng h\u1ed7n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ecm c\u00e1c s\u1ed1 nguy\u00ean n th\u1ecfa m\u00e3n $\\dfrac{-191}{14} < n < \\dfrac{-125}{12}$ <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: <br\/> $\\dfrac{-191}{14} = -13\\dfrac{9}{14}$ <br\/> $\\dfrac{-125}{12} = -10\\dfrac{5}{12}$ <br\/> Theo \u0111\u1ec1 b\u00e0i: $\\dfrac{-191}{14} < n < \\dfrac{-125}{12}$ <br\/> $-13 \\dfrac{9}{14} < n < -10\\dfrac{5}{12}$ <br\/> V\u00ec $-13\\dfrac{9}{14} < \\dfrac{-182}{14} = -13$; $ -11 = \\dfrac{-132}{12} < -10\\dfrac{5}{12}$ <br\/> $\\Rightarrow$ $-13 \\leq n \\leq -11$ <br\/> $\\Rightarrow$ $n \\in \\left\\{ -13, -12, -11 \\right\\}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":1737},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["1"],["1229"],["5000"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":" S\u1ed1 th\u1eadp ph\u00e2n 1,2458 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng h\u1ed7n s\u1ed1 l\u00e0: _input_<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n tr\u00ean d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 th\u1eadp ph\u00e2n r\u1ed3i \u0111\u1ed5i ra h\u1ed7n s\u1ed1 ","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n 1,2458 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 th\u1eadp ph\u00e2n <br\/> <b> B\u01b0\u1edbc 2: <\/b> R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 tr\u00ean <br\/> <b> B\u01b0\u1edbc 3: <\/b> Vi\u1ebft ph\u00e2n s\u1ed1 v\u1eeba r\u00fat g\u1ecdn ra h\u1ed7n s\u1ed1 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $1,2458 = \\dfrac{12458}{10000} = \\dfrac{6229}{5000} = 1 \\dfrac{1229}{5000}$"}]}],"id_ques":1738},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["24,125"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" H\u1ed7n s\u1ed1 $24\\dfrac{1}{8}$ \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n l\u00e0: _input_ ","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Vi\u1ebft h\u1ed7n s\u1ed1 tr\u00ean d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> L\u1ea5y t\u1eed s\u1ed1 chia m\u1eabu s\u1ed1 \u0111\u1ec3 \u0111\u01b0\u1ee3c s\u1ed1 th\u1eadp ph\u00e2n c\u1ea7n t\u00ecm <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $24\\dfrac{1}{8} = \\dfrac{193}{8} = 24,125$ <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 24,125 <\/span> "}]}],"id_ques":1739},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["170"]]],"list":[{"point":5,"width":50,"type_input":"","ques":" T\u00ednh. <br\/><br\/> $3\\dfrac{1}{5} - 1\\dfrac{1}{2}$ = _input_% ","hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c tr\u00ean <br\/>C\u00f3 th\u1ec3 \u0111\u1ed5i ra ph\u00e2n s\u1ed1 r\u1ed3i t\u00ednh ho\u1eb7c quy \u0111\u1ed3ng r\u1ed3i tr\u1eeb hai h\u1ed7n s\u1ed1<br\/> <b> B\u01b0\u1edbc 2: <\/b> Vi\u1ebft k\u1ebft qu\u1ea3 v\u1eeba t\u00ednh d\u01b0\u1edbi d\u1ea1ng k\u00ed hi\u1ec7u % <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $3\\dfrac{1}{5} - 1\\dfrac{1}{2} = \\dfrac{16}{5} - \\dfrac{3}{2} = \\dfrac{32}{10} - \\dfrac{15}{10} = \\dfrac{17}{10} $ <br\/> $\\dfrac{17}{10} = \\dfrac{170}{100} = 170 \\%$ <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 170 <\/span> "}]}],"id_ques":1740}],"lesson":{"save":0,"level":2}}