{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"H\u00e3y so s\u00e1nh c\u00e1c t\u00edch sau m\u00e0 kh\u00f4ng t\u00ednh gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng bi\u1ec3u th\u1ee9c<br\/> A = 2000 . 2000; B = 1999 . 2001","select":["A > B ","A < B ","A = B "],"hint":"\u1ede A t\u00e1ch 2000 = 1999 + 1, \u1edf B t\u00e1ch 2001 = 2000 + 1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span> V\u00ec A = 2000 . 2000 , B = 1999 . 2001 nh\u1eadn th\u1ea5y ta c\u00f3 th\u1ec3 t\u00e1ch 2000 = 1999 + 1 \u1edf A v\u00e0 2001 = 2000 + 1 \u1edf B \u0111\u1ec3 \u1edf c\u1ea3 A v\u00e0 B \u0111\u1ec1u c\u00f3 t\u00edch 1999 . 2000 <br\/> <b> B\u01b0\u1edbc 1: <\/b> A = 2000 . 2000 = (1999 + 1) . 2000<br\/> D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng \u0111\u1ec3 vi\u1ebft A th\u00e0nh t\u1ed5ng<br\/> <b> B\u01b0\u1edbc 2: <\/b> B = 1999 . 2001 = 1999 . (2000 + 1) <br\/>D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng \u0111\u1ec3 vi\u1ebft B th\u00e0nh t\u1ed5ng <br\/> <b> B\u01b0\u1edbc 3: <\/b> So s\u00e1nh t\u1ed5ng A v\u00e0 t\u1ed5ng B <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> $$\\begin{align*} A &= 2000 . 2000 \\\\ A &= (1999 + 1) . 2000 \\\\ A &= 1999 . 2000 + 2000\\end{align*}$$ $\\begin{align*} B &= 1999 . 2001 \\\\ B &= 1999 . (2000 + 1) \\\\ B &= 1999 . 2000 + 1999\\end{align*}$ <br\/> V\u00ec 1999 . 2000 = 1999 . 2000 m\u00e0 2000 > 1999 <br\/> N\u00ean A = 1999 . 2000 + 2000 > B = 1999 . 2000 + 1999<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A > B <\/span>","column":3}]}],"id_ques":191},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":"H\u00e3y so s\u00e1nh c\u00e1c t\u00edch sau m\u00e0 kh\u00f4ng t\u00ednh gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng bi\u1ec3u th\u1ee9c<br\/> M = 2010. 2014; N = 2012 . 2012","select":["M > N ","M = N ","M < N "],"hint":"\u1ede M t\u00e1ch 2014 = 2012 + 2, \u1edf N t\u00e1ch 2012 = 2010 + 2","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span> V\u00ec M = 2010 . 2014, N = 2012 . 2012 nh\u1eadn th\u1ea5y ta c\u00f3 th\u1ec3 t\u00e1ch 2014 = 2012 + 2 \u1edf M v\u00e0 2012 = 2010 + 2 \u1edf N \u0111\u1ec3 \u1edf c\u1ea3 M v\u00e0 N \u0111\u1ec1u c\u00f3 t\u00edch 2010 . 2012 <br\/> <b> B\u01b0\u1edbc 1: <\/b> M = 2010 . 2014 = 2010 . (2012 + 2) <br\/> D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng \u0111\u1ec3 vi\u1ebft M th\u00e0nh t\u1ed5ng<br\/> <b> B\u01b0\u1edbc 2: <\/b> N = 2012 . 2012 = (2010 + 2). 2012 <br\/>D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng \u0111\u1ec3 vi\u1ebft N th\u00e0nh t\u1ed5ng <br\/> <b> B\u01b0\u1edbc 3: <\/b> So s\u00e1nh t\u1ed5ng M v\u00e0 t\u1ed5ng N<br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> $$\\begin{align*} M &= 1010 . 2014 \\\\ M &= 2010 . (2012 + 2) \\\\ M &= 2010 . 2012 + 2 . 2010\\end{align*}$$ $\\begin{align*} N &= 2012 . 2012 \\\\ N &= (2010 + 2) . 2012 \\\\ N &= 2010 . 2012 + 2 . 2012\\end{align*}$ <br\/> V\u00ec 2010 . 2012 = 2010 . 2012 m\u00e0 2 . 2010 < 2 . 2012<br\/> N\u00ean M = 2010 . 2012 + 2 . 2010 < N = 2010 . 2012 + 2 . 2012 <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: M < N <\/span>","column":3}]}],"id_ques":192},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["11"]]],"list":[{"point":10,"width":50,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai4/lv3/img\/2.jpg' \/><\/center> <br\/>T\u00ecm x bi\u1ebft: <br\/> (83 + 519). x = 66 . 100 + 22 <br\/> x = _input_","hint":"Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft ta l\u1ea5yt\u00edch chia cho th\u1eeba s\u1ed1 \u0111\u00e3 bi\u1ebft","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh 66 . 100 + 22 <br\/> <b> B\u01b0\u1edbc 2: <\/b> x l\u00e0 th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft trong t\u00edch (83 + 519). x <br\/> Mu\u1ed1n t\u00ecm th\u1eeba s\u1ed1 ch\u01b0a bi\u1ebft ta 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\/> $\\begin{align*} (83 + 519).x &= 66 . 100 + 22 \\\\ (83 + 519). x &= 6600 + 22 \\\\ 602 . x &= 6622 \\\\ x &= 6622 : 602 \\\\ x &= 11 \\end{align*}$ <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 11<\/span>"}]}],"id_ques":193},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["4100"]]],"list":[{"point":10,"width":80,"type_input":"","ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai4/lv3/img\/4.jpg' \/><\/center> <br\/>T\u00ednh S = 5 + 10 + 15 + ... + 195 + 200 <br\/> V\u1eady S = _input_","hint":"T\u1ed5ng c\u1ee7a d\u00e3y c\u00e1ch \u0111\u1ec1u b\u1eb1ng s\u1ed1 h\u1ea1ng \u0111\u1ea7u c\u1ed9ng s\u1ed1 h\u1ea1ng cu\u1ed1i nh\u00e2n s\u1ed1 s\u1ed1 h\u1ea1ng r\u1ed3i \u0111em chia 2","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y <br\/> S\u1ed1 SH = (SH cu\u1ed1i - SH \u0111\u1ea7u) : Kho\u1ea3ng c\u00e1ch + 1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh t\u1ed5ng c\u1ee7a d\u00e3y c\u00e1c s\u1ed1 h\u1ea1ng c\u00e1ch \u0111\u1ec1u <br\/> S = (SH \u0111\u1ea7u + SH cu\u1ed1i) x S\u1ed1 SH : 2 <\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><br\/> Nh\u1eadn th\u1ea5y S = 5 + 10 + 15 + ... + 195 + 200 l\u00e0 d\u00e3y c\u00e1ch \u0111\u1ec1u 5 \u0111\u01a1n v\u1ecb <br\/> S\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y l\u00e0: <br\/> (200 - 5) : 5 + 1 = 40 (s\u1ed1 h\u1ea1ng) <br\/> T\u1ed5ng c\u1ee7a d\u00e3y l\u00e0: <br\/> S = (5 + 200) . 40 : 2 = 4100 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 4100<\/span> <br\/> <span class='basic_left'><span class='basic_green'> <i> L\u01b0u \u00fd: Mu\u1ed1n t\u00ednh t\u1ed5ng c\u1ee7a m\u1ed9t d\u00e3y c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean m\u00e0 b\u1ea5t c\u1ee9 hai s\u1ed1 li\u1ec1n nhau n\u00e0o c\u0169ng c\u00e1ch nhau d \u0111\u01a1n v\u1ecb ta l\u00e0m nh\u01b0 sau: <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y <br\/> s\u1ed1 SH = (SH cu\u1ed1i - SH \u0111\u1ea7u) : d + 1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh t\u1ed5ng <br\/> S = (SH \u0111\u1ea7u + SH cu\u1ed1i) x s\u1ed1 SH : 2 <\/i><\/span>"}]}],"id_ques":194},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["390"]]],"list":[{"point":10,"width":50,"type_input":"","ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai4/lv3/img\/4.jpg' \/><\/center> <br\/>T\u00ednh S = 5 + 8 + 11 + ... + 44 + 47 <br\/> V\u1eady S = _input_","hint":"T\u1ed5ng c\u1ee7a d\u00e3y c\u00e1ch \u0111\u1ec1u b\u1eb1ng s\u1ed1 h\u1ea1ng \u0111\u1ea7u c\u1ed9ng s\u1ed1 h\u1ea1ng cu\u1ed1i nh\u00e2n s\u1ed1 s\u1ed1 h\u1ea1ng r\u1ed3i \u0111em chia 2","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1:<\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y <br\/> S\u1ed1 SH = (SH cu\u1ed1i - SH \u0111\u1ea7u) : Kho\u1ea3ng c\u00e1ch + 1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh t\u1ed5ng c\u1ee7a d\u00e3y c\u00e1c s\u1ed1 h\u1ea1ng c\u00e1ch \u0111\u1ec1u <br\/> S = (SH \u0111\u1ea7u + SH cu\u1ed1i) x S\u1ed1 SH : 2 <\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><br\/> Nh\u1eadn th\u1ea5y S = 5 + 8 + 11 + ... + 44 + 47 l\u00e0 d\u00e3y c\u00e1ch \u0111\u1ec1u 3 \u0111\u01a1n v\u1ecb <br\/> S\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y l\u00e0: <br\/> (47 - 5) : 3 + 1 = 15 (s\u1ed1 h\u1ea1ng) <br\/> T\u1ed5ng c\u1ee7a d\u00e3y l\u00e0: <br\/> S = (5 + 47) . 15 : 2 = 390 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 390<\/span> <br\/> <span class='basic_left'><span class='basic_green'> <i> L\u01b0u \u00fd: Mu\u1ed1n t\u00ednh t\u1ed5ng c\u1ee7a m\u1ed9t d\u00e3y c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean m\u00e0 b\u1ea5t c\u1ee9 hai s\u1ed1 li\u1ec1n nhau n\u00e0o c\u0169ng c\u00e1ch nhau d \u0111\u01a1n v\u1ecb ta l\u00e0m nh\u01b0 sau: <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y <br\/> s\u1ed1 SH = (SH cu\u1ed1i - SH \u0111\u1ea7u) : d + 1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh t\u1ed5ng <br\/> S = (SH \u0111\u1ea7u + SH cu\u1ed1i) x s\u1ed1 SH : 2 <\/i><\/span>"}]}],"id_ques":195},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["5950"]]],"list":[{"point":10,"width":80,"type_input":"","ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai4/lv3/img\/3.jpg' \/><\/center> <br\/>T\u00ednh t\u1ed5ng c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c l\u1edbn h\u01a1n 350 v\u00e0 nh\u1ecf h\u01a1n 500? <br\/> T\u1ed5ng l\u00e0: _input_","hint":"T\u1ed5ng c\u1ee7a d\u00e3y c\u00e1ch \u0111\u1ec1u 10 \u0111\u01a1n v\u1ecb","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> C\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c l\u1edbn h\u01a1n 350 v\u00e0 nh\u1ecf h\u01a1n 500 l\u00e0: 360; 370; 380; ...; 490 <br\/> D\u00e3y tr\u00ean ch\u00ednh l\u00e0 d\u00e3y c\u00e1c s\u1ed1 h\u1ea1ng c\u00e1ch \u0111\u1ec1u 10 \u0111\u01a1n v\u1ecb<br\/><b> B\u01b0\u1edbc 1:<\/b> T\u00ednh s\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y <br\/> S\u1ed1 SH = (SH cu\u1ed1i - SH \u0111\u1ea7u) : Kho\u1ea3ng c\u00e1ch + 1 <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh t\u1ed5ng c\u1ee7a d\u00e3y c\u00e1c s\u1ed1 h\u1ea1ng c\u00e1ch \u0111\u1ec1u <br\/> S = (SH \u0111\u1ea7u + SH cu\u1ed1i) x S\u1ed1 SH : 2 <\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><br\/> C\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c l\u1edbn h\u01a1n 350 v\u00e0 nh\u1ecf h\u01a1n 500 l\u00e0: 360; 370; 380; ...; 490<br\/> C\u00e1c s\u1ed1 tr\u00ean ch\u00ednh l\u00e0 d\u00e3y c\u00e1c s\u1ed1 c\u00e1ch \u0111\u1ec1u 10 \u0111\u01a1n v\u1ecb <br\/> S\u1ed1 s\u1ed1 h\u1ea1ng c\u1ee7a d\u00e3y l\u00e0: <br\/> (490 - 360) : 10 + 1 = 14 (s\u1ed1 h\u1ea1ng) <br\/> T\u1ed5ng c\u1ee7a d\u00e3y l\u00e0: <br\/> (360 + 490) . 14 : 2 = 5950 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 5950<\/span> "}]}],"id_ques":196},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["2"],["0"],["1"],["3"]]],"list":[{"point":10,"width":80,"type_input":"","ques":" T\u00ecm ch\u1eef s\u1ed1 a, b, c, d bi\u1ebft: $\\overline{abcd} + \\overline{abc} + \\overline{ab} + a= 2236$ (0 < a < 3)<br\/> <br\/> a = _input_ <br\/> b = _input_ <br\/> c = _input_<br\/> d = _input_","hint":"Ph\u00e2n t\u00edch d\u1ef1a theo c\u1ea5u t\u1ea1o s\u1ed1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ph\u00e2n t\u00edch c\u00e1c s\u1ed1 h\u1ea1ng tr\u00ean theo c\u1ea5u t\u1ea1o s\u1ed1 r\u1ed3i t\u00ecm m\u1ed1i quan h\u1ec7 c\u1ee7a a, b, c, d<br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00e1ch c\u00e1c s\u1ed1 h\u1ea1ng tr\u00ean theo m\u1eabu $\\overline{abcd}$ = a. 1000 + b.100 + c.10 + d <br\/> <b> B\u01b0\u1edbc 2: <\/b> Nh\u00f3m c\u00e1c s\u1ed1 c\u00f3 a, b, c, d v\u00e0o t\u1eebng nh\u00f3m <br\/> <b> B\u01b0\u1edbc 3: <\/b> L\u1eadp lu\u1eadn \u0111\u1ec3 t\u00ecm a, b, c, d<\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><br\/> $\\begin{align*}\\overline{abcd} + \\overline{abc}+\\overline{ab} + a &= 2236 \\\\ a.1000 + b.100 + c.10 + d + a.100 + b.10 + c + a.10 + b + a &= 2236 \\\\ a.(1000 + 100 + 10 + 1) + b.(100 + 10 + 1) + c.(10 + 1) + d &= 2236 \\\\ a.1111 + b.111 + c.11 + d &= 2236 \\end{align*}$ <br\/> V\u00ec b. 111 + c. 11 + d (l\u1edbn nh\u1ea5t) = 111 . 9 + 11 . 9 + 9 = 1107 <br\/> Suy ra a (nh\u1ecf nh\u1ea5t) = 2236 - 1107 = 1129 > 1111 . 1 <br\/> N\u00ean a > 1, theo \u0111\u1ec1 b\u00e0i a < 3 n\u00ean <b> a = 2 <\/b> <br\/> V\u1edbi a = 2 ta c\u00f3: 1111 . 2 + b.111 + 11.c + d = 2236 <br\/> b . 111 + c . 11 + d = 14 <br\/> V\u1eady <b> b = 0, c = 1, d = 3 <\/b> <br\/> S\u1ed1 \u0111\u00f3 l\u00e0 2013<br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 2; 0; 1; 3<\/span> "}]}],"id_ques":197},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["4468800"]]],"list":[{"point":10,"width":90,"type_input":"","ques":" T\u00ednh nhanh: <br\/> 22344 . 36 + 44688 . 82 = _input_","hint":"44688 = 22344 . 2","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ta th\u1ea5y 44688 = 2 . 22344g <br\/> Nh\u00f3m 22344 ra ngo\u00e0i r\u1ed3i t\u00ednh ph\u00e9p t\u00ednh trong ngo\u1eb7c tr\u01b0\u1edbc<\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>$\\begin{align*}& 22344 . 36 + 44688 . 82 \\\\ =& 22344 . 36 + 22344 . 2 . 82 \\\\= & 22344 . (36 + 2 . 82) (\\text{t\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng}) \\\\ =& 22344 . (36 + 164) \\\\ =& 22344 . 200 \\\\ =& 4468800 \\end{align*}$<br\/> <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 4468800<\/span> "}]}],"id_ques":198},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai4/lv3/img\/5.jpg' \/><\/center> <br\/>H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang: <br\/> (315 + 930 + 55). 40 <span class='basic_hoi_black'>?<\/span> 7 . 9 . 5 . 8 + 62 . 15 + 55 . 40","select":["A. > ","B . < ","C. = "],"hint":"T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c \u1edf VT v\u00e0 VP r\u1ed3i so s\u00e1nh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span> <b> B\u01b0\u1edbc 1: <\/b> Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh \u1edf VT <br\/> <b> B\u01b0\u1edbc 2: <\/b> Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh \u1edf VP <br\/> <B\u01b0\u1edbc 3: <\/b> So s\u00e1nh VT v\u00e0 VP <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> $\\begin{align*} VT &= (315 + 930 + 55) . 40 \\\\&= 1300 . 40 \\\\ &= 52 000\\end{align*} $ <br\/> $\\begin{align*} VP &= 7.9.5.8 + 62.15 + 55.40 \\\\&= 2520 + 930 + 2200 \\\\ &= 5650\\end{align*}$<br\/> V\u00ec 52 000 > 5650 <br\/> N\u00ean (315 + 930 + 55). 40 > 7 . 9 . 5 . 8 + 62 . 15 + 55 . 40 <br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. > <\/span>","column":3}]}],"id_ques":199},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["85"]]],"list":[{"point":10,"width":80,"type_input":"","ques":" T\u00ecm m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 hai ch\u1eef s\u1ed1 bi\u1ebft n\u1ebfu vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i s\u1ed1 \u0111\u00f3 th\u00ec \u0111\u01b0\u1ee3c s\u1ed1 m\u1edbi. Bi\u1ebft t\u1ed5ng s\u1ed1 m\u1edbi v\u00e0 s\u1ed1 \u0111\u00e3 cho l\u00e0 938 <br\/> S\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 \u0111\u00f3 l\u00e0: _input_","hint":"G\u1ecdi s\u1ed1 c\u00f3 hai ch\u1eef s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 $\\overline{ab}$, ta c\u00f3: $\\overline{ab3} + \\overline{ab}$ = 938","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 $\\overline{ab}$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Sau khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i s\u1ed1 \u0111\u00f3 ta \u0111\u01b0\u1ee3c s\u1ed1 $\\overline{ab3}$ <br\/> <b> B\u01b0\u1edbc 3: <\/b> Theo b\u00e0i ra ta c\u00f3: $\\overline{ab3}$ + $\\overline{ab}$ = 938<\/span><br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 $\\overline{ab}$ <br\/> Sau khi vi\u1ebft th\u00eam ch\u1eef s\u1ed1 3 v\u00e0o b\u00ean ph\u1ea3i s\u1ed1 \u0111\u00f3 ta \u0111\u01b0\u1ee3c s\u1ed1 $\\overline{ab3}$ <br\/> V\u00ec t\u1ed5ng s\u1ed1 m\u1edbi v\u00e0 s\u1ed1 \u0111\u00e3 cho b\u1eb1ng 938 n\u00ean ta c\u00f3: <br\/> $\\overline{ab3}$ + $\\overline{ab}$ = 938 <br\/> $\\begin{align*} \\overline{ab3} + \\overline{ab} &= 938 \\\\ \\overline{ab}. 10 + 3 + \\overline{ab} &= 938 \\\\ \\overline{ab}. 11 &= 938 - 3 \\\\ \\overline{ab}. 11 &= 935 \\\\ \\overline{ab} &= 85 \\end{align*}$<br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n t\u00ecm l\u00e0: 85<\/span> "}]}],"id_ques":200}],"lesson":{"save":0,"level":3}}