{"segment":[{"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":[[["9"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{-3}{8}$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">-24<\/div><\/div>","hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 a <br\/> X\u00e9t t\u00edch: -3 . (-24) = 8 . a <br\/> T\u1eeb \u0111\u00f3 t\u00ednh \u0111\u01b0\u1ee3c a <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 a <br\/> V\u00ec $\\dfrac{-3}{8} = \\dfrac{a}{-24}$ n\u00ean -3 . (-24) = 8 . a <br\/> V\u00ec v\u1eady a = -3 . (-24) : 8 = 9 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 9 <\/span> "}]}],"id_ques":1421},{"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":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{121}{154}$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">14<\/div><\/div>","hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 a <br\/> X\u00e9t t\u00edch: 121 . 14 = 154 . a <br\/> T\u1eeb \u0111\u00f3 t\u00ednh \u0111\u01b0\u1ee3c a <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi s\u1ed1 c\u1ea7n t\u00ecm l\u00e0 a <br\/> V\u00ec $\\dfrac{121}{154} = \\dfrac{a}{14}$ n\u00ean 121 . 14 = 154 . a <br\/> V\u00ec v\u1eady a = 121 . 14 : 154 = 11 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 11 <\/span> "}]}],"id_ques":1422},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["47"],["60"]]],"list":[{"point":5,"width":50,"ques":"Vi\u1ebft 47 ph\u00fat d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 v\u1edbi \u0111\u01a1n v\u1ecb l\u00e0 gi\u1edd. <br\/> \u0110\u00e1p \u00e1n l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>gi\u1edd","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec 1 gi\u1edd = 60 ph\u00fat <br\/> N\u00ean 47 ph\u00fat = $\\dfrac{47}{60}$ gi\u1edd "}]}],"id_ques":1423},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["23"],["10"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"Vi\u1ebft 23 cm d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 v\u1edbi \u0111\u01a1n v\u1ecb l\u00e0 \u0111\u1ec1-xi-m\u00e9t . <br\/> \u0110\u00e1p \u00e1n l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>dm","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec 1dm = 10cm <br\/> N\u00ean 23cm = $\\dfrac{23}{10}$dm"}]}],"id_ques":1424},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["197"],["1000"]]],"list":[{"point":5,"width":60,"type_input":"","input_hint":["frac"],"ques":"Vi\u1ebft 197mm d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 v\u1edbi \u0111\u01a1n v\u1ecb l\u00e0 m\u00e9t . <br\/> \u0110\u00e1p \u00e1n l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div> m","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec 1m = 1000mm <br\/> N\u00ean 197mm = $\\dfrac{197}{1000}$m"}]}],"id_ques":1425},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/12.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn c\u1eb7p ph\u00e2n s\u1ed1 b\u1eb1ng nhau trong c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 sau:","select":["A. $\\dfrac{2}{3}$ v\u00e0 $\\dfrac{3}{4}$","B. $\\dfrac{2}{5}$ v\u00e0 $\\dfrac{-2}{-5}$","C. $\\dfrac{2}{5}$ v\u00e0 $\\dfrac{-2}{5}$ ","D. $\\dfrac{6}{10}$ v\u00e0 $\\dfrac{3}{-5}$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span><br\/> D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau, x\u00e9t t\u00edch ch\u00e9o \u0111\u1ec3 xem c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 c\u00f3 b\u1eb1ng nhau kh\u00f4ng <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t c\u1eb7p ph\u00e2n s\u1ed1 $\\dfrac{2}{3}$ v\u00e0 $\\dfrac{3}{4}$ <br\/> C\u00f3: 2 . 4 = 8 $\\neq$ 9 = 3 . 3 <br\/> N\u00ean ph\u00e2n s\u1ed1 $\\dfrac{2}{3}$ $\\neq$ $\\dfrac{3}{4}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{2}{5}$ v\u00e0 $\\dfrac{-2}{-5}$ <br\/> C\u00f3: 2 . (-5) = 10 = 5 . (-2) <br\/> N\u00ean $\\dfrac{2}{5} = \\dfrac{-2}{-5}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1: $\\dfrac{2}{5}$ v\u00e0 $\\dfrac{-2}{5}$ <br\/> C\u00f3: 2 . 5 = 10 $\\neq$ -10 = 5 . (-2) <br\/> N\u00ean $\\dfrac{2}{5} \\neq \\dfrac{-2}{5}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1: $\\dfrac{6}{10}$ v\u00e0 $\\dfrac{3}{-5}$ <br\/> C\u00f3: 6 . (-5) = -30 $\\neq$ 30 = 10 . 3 <br\/> N\u00ean $\\dfrac{6}{10} \\neq \\dfrac{3}{-5}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. $\\dfrac{2}{5}$ v\u00e0 $\\dfrac{-2}{-5}$ <\/span>","column":2}]}],"id_ques":1426},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/12.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn c\u1eb7p ph\u00e2n s\u1ed1 b\u1eb1ng nhau trong c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 sau:","select":["A. $\\dfrac{4}{7}$ v\u00e0 $\\dfrac{-8}{14}$","B. $\\dfrac{-2}{5}$ v\u00e0 $\\dfrac{-4}{-10}$","C. $\\dfrac{2}{3}$ v\u00e0 $\\dfrac{3}{2}$ ","D. $\\dfrac{1}{2}$ v\u00e0 $\\dfrac{-2}{-4}$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span><br\/> D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau, x\u00e9t t\u00edch ch\u00e9o \u0111\u1ec3 xem c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 c\u00f3 b\u1eb1ng nhau kh\u00f4ng <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t c\u1eb7p ph\u00e2n s\u1ed1 $\\dfrac{4}{7}$ v\u00e0 $\\dfrac{-8}{14}$<br\/> C\u00f3: 4 . 14 = 56$\\neq$ -56 = 7 . (-8) <br\/> N\u00ean ph\u00e2n s\u1ed1 $\\dfrac{4}{7}$ $\\neq$ $\\dfrac{-8}{14}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-2}{5}$ v\u00e0 $\\dfrac{-4}{-10}$<br\/> C\u00f3: -2 . (-10) = 20 $\\neq$ -20 = 5 . (-4) <br\/> N\u00ean $\\dfrac{-2}{5} \\neq \\dfrac{-4}{-10}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1: $\\dfrac{2}{3}$ v\u00e0 $\\dfrac{3}{2}$ <br\/> C\u00f3: 2 . 2 = 4 $\\neq$ 9 = 3 . 3 <br\/> N\u00ean $\\dfrac{2}{3} \\neq \\dfrac{3}{2}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1: $\\dfrac{1}{2}$ v\u00e0 $\\dfrac{-2}{-4}$ <br\/> C\u00f3: 1 . (-4) = -4 = 2 . (-2) <br\/> N\u00ean $\\dfrac{1}{2} = \\dfrac{-2}{-4}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. $\\dfrac{1}{2}$ v\u00e0 $\\dfrac{-2}{-4}$ <\/span>","column":2}]}],"id_ques":1427},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/11.jpg' \/><\/center> <br\/> T\u1eeb \u0111\u1eb3ng th\u1ee9c 4 . (-8) = (-2) . 16 ta l\u1eadp \u0111\u01b0\u1ee3c c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 b\u1eb1ng nhau d\u01b0\u1edbi \u0111\u00e2y. H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n sai.","select":["A. $\\dfrac{-2}{4} = \\dfrac{-8}{16}$","B. $\\dfrac{4}{-8} = \\dfrac{-2}{16}$","C. $\\dfrac{4}{-2} = \\dfrac{16}{-8}$ ","D. $\\dfrac{4}{16} = \\dfrac{-2}{-8}$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span><br\/> L\u1eadp c\u00e1c t\u00edch ch\u00e9o c\u1ee7a c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 tr\u00ean \u0111\u1ec3 xem c\u1eb7p ph\u00e2n s\u1ed1 n\u00e0o kh\u00f4ng b\u1eb1ng nhau <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-2}{4}$ v\u00e0 $\\dfrac{-8}{16}$ <br\/> C\u00f3: (-2) . 16 = -32 = 4 . (-8) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-2}{4} = \\dfrac{-8}{16}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{4}{-8}$ v\u00e0 $\\dfrac{-2}{16}$ <br\/> C\u00f3: 4 . 16 = 64 $\\neq$ 16 = (-8) . (-2) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{4}{-8} = \\dfrac{-2}{16}$ l\u00e0 <b> sai <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{4}{-2}$ v\u00e0 $\\dfrac{16}{-8}$ <br\/> C\u00f3: 4 . (-8) = -32 = (-2) . 16 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{4}{-2} = \\dfrac{16}{-8}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{4}{16}$ v\u00e0 $\\dfrac{-2}{-8}$ <br\/> C\u00f3: 4 . (-8) = -32 = 16 . (-2) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{4}{16} = \\dfrac{-2}{-8}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n sai l\u00e0: B. $\\dfrac{4}{-8} = \\dfrac{-2}{16}$ <\/span>","column":2}]}],"id_ques":1428},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/11.jpg' \/><\/center> <br\/> T\u1eeb \u0111\u1eb3ng th\u1ee9c 6 . (-4) = 3 . (-8) ta l\u1eadp \u0111\u01b0\u1ee3c c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 b\u1eb1ng nhau d\u01b0\u1edbi \u0111\u00e2y. H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n sai.","select":["A. $\\dfrac{6}{3} = \\dfrac{-8}{-4}$","B. $\\dfrac{6}{-8} = \\dfrac{3}{-4}$","C. $\\dfrac{-4}{6} = \\dfrac{3}{-8}$ ","D. $\\dfrac{-4}{3} = \\dfrac{-8}{6}$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span><br\/> L\u1eadp c\u00e1c t\u00edch ch\u00e9o c\u1ee7a c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 tr\u00ean \u0111\u1ec3 xem c\u1eb7p ph\u00e2n s\u1ed1 n\u00e0o kh\u00f4ng b\u1eb1ng nhau <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{6}{3}$ v\u00e0 $\\dfrac{-8}{-4}$ <br\/> C\u00f3: 6 . (-4) = -24 = 3 . (-8) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{6}{3} = \\dfrac{-8}{-4}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{6}{-8}$ v\u00e0 $\\dfrac{3}{-4}$ <br\/> C\u00f3: 6 . (-4) = -24 = (-8) . 3 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{6}{-8} = \\dfrac{3}{-4}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-4}{6}$ v\u00e0 $\\dfrac{3}{-8}$ <br\/> C\u00f3: -4 . (-8) = 32 $\\neq$ 18 = 6 . 8 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-4}{6} = \\dfrac{3}{-8}$ l\u00e0 <b> sai <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-4}{3}$ v\u00e0 $\\dfrac{-8}{6}$ <br\/> C\u00f3: -4 . 6 = -24 = 3 . (-8) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-4}{3} = \\dfrac{-8}{8}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n sai l\u00e0: C. $\\dfrac{-4}{6} = \\dfrac{3}{-8}$ <\/span>","column":2}]}],"id_ques":1429},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/11.jpg' \/><\/center> <br\/> T\u1eeb \u0111\u1eb3ng th\u1ee9c -7 . (-8) = 14 . 4 ta l\u1eadp \u0111\u01b0\u1ee3c c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 b\u1eb1ng nhau d\u01b0\u1edbi \u0111\u00e2y. H\u00e3y ch\u1ecdn \u0111\u00e1p \u00e1n sai.","select":["A. $\\dfrac{4}{14} = \\dfrac{-7}{-8}$","B. $\\dfrac{-7}{14} = \\dfrac{4}{-8}$","C. $\\dfrac{-7}{4} = \\dfrac{14}{-8}$ ","D. $\\dfrac{-8}{4} = \\dfrac{14}{-7}$"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <\/span><br\/> L\u1eadp c\u00e1c t\u00edch ch\u00e9o c\u1ee7a c\u00e1c c\u1eb7p ph\u00e2n s\u1ed1 tr\u00ean \u0111\u1ec3 xem c\u1eb7p ph\u00e2n s\u1ed1 n\u00e0o kh\u00f4ng b\u1eb1ng nhau <br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{4}{14}$ v\u00e0 $\\dfrac{-7}{-8}$ <br\/> C\u00f3: 4 . (-8) = -32 $\\neq$ -98 = 14 . (-7) n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{4}{14} = \\dfrac{-7}{-8}$ l\u00e0 <b> sai <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-7}{14}$ v\u00e0 $\\dfrac{4}{-8}$ <br\/> C\u00f3: -7 . (-8) = 56 = 14 . 4 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-7}{14} = \\dfrac{4}{-8}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-7}{4}$ v\u00e0 $\\dfrac{14}{-8}$ <br\/> C\u00f3: -7 . (-8) = 56 = 4 . 14 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-7}{4} = \\dfrac{14}{-8}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-8}{4}$ v\u00e0 $\\dfrac{14}{-7}$ <br\/> C\u00f3: -8 . (-7) = 56 = 4 . 14 n\u00ean kh\u1eb3ng \u0111\u1ecbnh $\\dfrac{-8}{4} = \\dfrac{14}{-7}$ l\u00e0 <b> \u0111\u00fang <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n sai l\u00e0: A. $\\dfrac{4}{14} = \\dfrac{-7}{-8}$ <\/span>","column":2}]}],"id_ques":1430},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["-3"],["4"]]],"list":[{"point":5,"width":60,"type_input":"","input_hint":["frac"],"ques":"Vi\u1ebft ph\u00e2n s\u1ed1 sau d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 c\u00f3 m\u1eabu d\u01b0\u01a1ng. <br\/> $\\dfrac{3}{-4}$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{3}{-4}$ v\u1edbi (-1) ta \u0111\u01b0\u1ee3c: <br\/> $\\dfrac{3}{-4} = \\dfrac{3 . (-1)}{-4 . (-1)} = \\dfrac{-3}{4}$ <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: Mu\u1ed1n chuy\u1ec3n m\u1ed9t ph\u00e2n s\u1ed1 t\u1eeb d\u1ea1ng m\u1eabu \u00e2m v\u1ec1 ph\u00e2n s\u1ed1 c\u00f3 m\u1eabu d\u01b0\u01a1ng ta \u0111em nh\u00e2n c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi (-1) <\/i><\/span>"}]}],"id_ques":1431},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["41"],["45"]]],"list":[{"point":5,"width":60,"ques":"Vi\u1ebft ph\u00e2n s\u1ed1 sau d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 c\u00f3 m\u1eabu d\u01b0\u01a1ng. <br\/> $\\dfrac{-41}{-45}$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div> ","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{-41}{-45}$ v\u1edbi (-1) ta \u0111\u01b0\u1ee3c: <br\/> $\\dfrac{-41 . (-1)}{-45 . (-1)} = \\dfrac{41}{45}$ "}]}],"id_ques":1432},{"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":[[["-8"],["-21"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{-4}{7}$ =<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">14<\/div><\/div>= <div class=\"frac123\"><div class=\"ts\">12<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi 2 s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0 a, b: $\\dfrac{-4}{7} = \\dfrac{a}{14} = \\dfrac{12}{b}$ <br\/> Ta c\u00f3: $\\dfrac{-4}{7} = \\dfrac{a}{14}$ $\\Rightarrow$ -4 . 14 = 7 . a <br\/> Do \u0111\u00f3 a = $\\dfrac{-4 . 14}{7} = -8$ <br\/> $\\dfrac{-4}{7} = \\dfrac{12}{b}$ $\\Rightarrow$ -4 . b = 7 . 12 <br\/> Do \u0111\u00f3: $b = \\dfrac{7 . 12}{-4} = -21$ <br\/> <span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: -8; -21 <\/span> <br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: Theo \u0111\u1ecbnh ngh\u0129a hai ph\u00e2n s\u1ed1 b\u1eb1ng nhau t\u1eeb $\\dfrac{a}{b} = \\dfrac{c}{d}$ ta c\u00f3 a. d = b . c <br\/> $\\Rightarrow$ $a = \\dfrac{b.c}{d}$; $b = \\dfrac{a.d}{c}$; $c = \\dfrac{a.d}{b}$; $d = \\dfrac{b.c}{a}$ <\/i> <\/span> "}]}],"id_ques":1433},{"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":[[["-15"],["4"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{-2}{5}$ = <div class=\"frac123\"><div class=\"ts\">6<\/div><div class=\"ms\">_input_<\/div><\/div>= <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">-10<\/div><\/div>$","hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi 2 s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0 a, b: $\\dfrac{-2}{5} = \\dfrac{6}{a} = \\dfrac{b}{-10}$ <br\/> Ta c\u00f3: $\\dfrac{-2}{5} = \\dfrac{6}{a}$ $\\Rightarrow$ -2 . a = 5 . 6 <br\/> Do \u0111\u00f3 a = $\\dfrac{5 . 6}{-2} = -15$ <br\/> $\\dfrac{-2}{5} = \\dfrac{b}{-10}$ $\\Rightarrow$ -2 . (-10) = b . 5 <br\/> Do \u0111\u00f3: $b = \\dfrac{-2 . (-10)}{5} = 4$ <br\/> <span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: -15; 4 <\/span> "}]}],"id_ques":1434},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/2.jpg' \/><\/center> <br\/> Ph\u00e2n s\u1ed1 $\\dfrac{-4}{5}$ b\u1eb1ng ph\u00e2n s\u1ed1 n\u00e0o sau \u0111\u00e2y:","select":["A. $\\dfrac{21}{-26}$","B. $\\dfrac{-36}{-45}$","C. $\\dfrac{28}{35}$ ","D. $\\dfrac{-36}{45}$"],"hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m: Ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u00e0 ph\u00e2n s\u1ed1 $\\dfrac{c}{d}$ g\u1ecdi l\u00e0 b\u1eb1ng nhau n\u1ebfu a . c = b . d","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{21}{-26}$ v\u00e0 $\\dfrac{-4}{5}$ <br\/> C\u00f3: 21 . 5 = 105 $\\neq$ 104 = (-26) . (-4) n\u00ean $\\dfrac{21}{-26} \\neq \\dfrac{-4}{5}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-36}{-45}$ v\u00e0 $\\dfrac{-4}{5}$ <br\/> C\u00f3: -36 . 5 = -180 $\\neq$ 180 = (-45) . (-4) n\u00ean $\\dfrac{-36}{-45} \\neq \\dfrac{-4}{5}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{28}{35}$ v\u00e0 $\\dfrac{-4}{5}$ <br\/> C\u00f3: 28 . 5 = 140 $\\neq$ -140 = 35 . (-4) n\u00ean $\\dfrac{28}{35} \\neq \\dfrac{-4}{5}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-36}{45}$ v\u00e0 $\\dfrac{-4}{5}$ <br\/> C\u00f3: -36 . 5 = -180 = 45 . (-4) n\u00ean $\\dfrac{-36}{45} = \\dfrac{-4}{5}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. $\\dfrac{-36}{45}$ <\/span>","column":2}]}],"id_ques":1435},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/2.jpg' \/><\/center> <br\/> Ph\u00e2n s\u1ed1 $\\dfrac{7}{-3}$ b\u1eb1ng ph\u00e2n s\u1ed1 n\u00e0o sau \u0111\u00e2y:","select":["A. $\\dfrac{21}{9}$","B. $\\dfrac{-21}{-9}$","C. $\\dfrac{-42}{18}$ ","D. $\\dfrac{18}{42}$"],"hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m: Ph\u00e2n s\u1ed1 $\\dfrac{a}{b}$ v\u00e0 ph\u00e2n s\u1ed1 $\\dfrac{c}{d}$ g\u1ecdi l\u00e0 b\u1eb1ng nhau n\u1ebfu a . c = b . d","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{21}{9}$ v\u00e0 $\\dfrac{7}{-3}$ <br\/> C\u00f3: 21 . (-3) = -63 $\\neq$ 63 = 9 . 7 n\u00ean $\\dfrac{21}{9} \\neq \\dfrac{7}{-3}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-21}{-9}$ v\u00e0 $\\dfrac{7}{-3}$ <br\/> C\u00f3: -21 . (-3) = 63 $\\neq$ -63 = (-9) . 7 n\u00ean $\\dfrac{-21}{-9} \\neq \\dfrac{7}{-3}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-42}{18}$ v\u00e0 $\\dfrac{7}{-3}$ <br\/> C\u00f3: -42 . (-3) = 126 = 18 . 7 n\u00ean $\\dfrac{-42}{18} = \\dfrac{7}{-3}$ <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{18}{42}$ v\u00e0 $\\dfrac{7}{-3}$ <br\/> C\u00f3: 18 . (-3) = -54 $\\neq$ 294 = 42 . 7 n\u00ean $\\dfrac{18}{42} \\neq \\dfrac{7}{-3}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $\\dfrac{-42}{18}$ <\/span>","column":2}]}],"id_ques":1436},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/8.jpg' \/><\/center> <br\/> Cho t\u1eadp h\u1ee3p A = {2; -1; 0}; B = {4; -5}. H\u00e3y ch\u1ecdn ph\u00e2n s\u1ed1 c\u00f3 t\u1eed s\u1ed1 thu\u1ed9c t\u1eadp h\u1ee3p A v\u00e0 m\u1eabu s\u1ed1 thu\u1ed9c t\u1eadp h\u1ee3p B.","select":["A. $\\dfrac{-1}{2}$","B. $\\dfrac{2}{-5}$","C. $\\dfrac{0}{1}$ ","D. $\\dfrac{-5}{2}$"],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{-1}{2}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 -1 $\\in$ A nh\u01b0ng m\u1eabu s\u1ed1 l\u00e0 2 $\\notin$ B <b> (lo\u1ea1i) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{2}{-5}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 2 $\\in$ A v\u00e0 m\u1eabu s\u1ed1 l\u00e0 -5 $\\in$ B <b> (th\u1ecfa m\u00e3n) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{0}{1}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 0 $\\in$ A nh\u01b0ng m\u1eabu s\u1ed1 l\u00e0 1 $\\notin$ B <b> (lo\u1ea1i) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{-5}{2}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 -5 $\\notin$ A v\u00e0 m\u1eabu s\u1ed1 l\u00e0 2 $\\notin$ B <b> (lo\u1ea1i) <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. $\\dfrac{2}{-5}$ <\/span>","column":2}]}],"id_ques":1437},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/8.jpg' \/><\/center> <br\/> Cho t\u1eadp h\u1ee3p M = {1; 2; -4}; P = {5; -2}. H\u00e3y ch\u1ecdn ph\u00e2n s\u1ed1 c\u00f3 t\u1eed s\u1ed1 thu\u1ed9c t\u1eadp h\u1ee3p M v\u00e0 m\u1eabu s\u1ed1 thu\u1ed9c t\u1eadp h\u1ee3p P.","select":["A. $\\dfrac{1}{2}$","B. $\\dfrac{-4}{3}$","C. $\\dfrac{2}{-2}$ ","D. $\\dfrac{-2}{1}$"],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> X\u00e9t ph\u00e2n s\u1ed1 $\\dfrac{1}{2}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 1 $\\in$ M nh\u01b0ng m\u1eabu s\u1ed1 l\u00e0 2 $\\notin$ P <b> (lo\u1ea1i) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{-4}{3}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 -4 $\\in$ M nh\u01b0ng m\u1eabu s\u1ed1 l\u00e0 3 $\\notin$ P <b> (lo\u1ea1i) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{2}{-2}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 2 $\\in$ M v\u00e0 m\u1eabu s\u1ed1 l\u00e0 -2 $\\in$ P <b> (th\u1ecfa m\u00e3n) <\/b> <br\/> Ph\u00e2n s\u1ed1: $\\dfrac{-2}{1}$ c\u00f3 t\u1eed s\u1ed1 l\u00e0 -2 $\\notin$ M v\u00e0 m\u1eabu s\u1ed1 l\u00e0 1 $\\notin$ P <b> (lo\u1ea1i) <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $\\dfrac{-2}{2}$ <\/span>","column":2}]}],"id_ques":1438},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/3.jpg' \/><\/center> <br\/> T\u00ecm \u0111i\u1ec1u ki\u1ec7n c\u1ee7a n \u0111\u1ec3 $\\dfrac{8}{n - 1}$ l\u00e0 ph\u00e2n s\u1ed1 l\u00e0:","select":["A. n = 1","B. $n \\in \\mathbb{Z}$","C. $n \\neq 1$ ","D. M\u1ecdi gi\u00e1 tr\u1ecb c\u1ee7a n \u0111\u1ec1u th\u1ecfa m\u00e3n"],"hint":"$\\dfrac{a}{b}$ \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t ph\u00e2n s\u1ed1 n\u1ebfu $a, b \\in \\mathbb{Z}, b \\neq 0$","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> \u0110\u1ec3 $\\dfrac{8}{n - 1}$ l\u00e0 ph\u00e2n s\u1ed1 th\u00ec (n - 1) $\\neq$ 0 <br\/> V\u00ec n - 1 = 0 khi n = 1 n\u00ean (n - 1) $\\neq$ 0 khi n $\\neq$ 1<br\/> V\u1eady \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 $\\dfrac{8}{n - 1}$ l\u00e0 ph\u00e2n s\u1ed1 l\u00e0 n $\\neq$ 1 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $n \\neq 1$","column":2}]}],"id_ques":1439},{"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":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai29/lv2/img\/3.jpg' \/><\/center> <br\/> T\u00ecm \u0111i\u1ec1u ki\u1ec7n c\u1ee7a n \u0111\u1ec3 $\\dfrac{4}{2n - 4}$ l\u00e0 ph\u00e2n s\u1ed1 l\u00e0:","select":["A. $n \\in \\mathbb{N}$","B. $n \\in \\mathbb{Z}$","C. $n \\neq -2$ ","D. $n \\neq 2$"],"hint":"$\\dfrac{a}{b}$ \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t ph\u00e2n s\u1ed1 n\u1ebfu $a, b \\in \\mathbb{Z}, b \\neq 0$","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> \u0110\u1ec3 $\\dfrac{4}{2n - 4}$ l\u00e0 ph\u00e2n s\u1ed1 th\u00ec (2n - 4) $\\neq$ 0 <br\/> V\u00ec 2n - 4 = 0 khi n = 2 n\u00ean (2n - 4) $\\neq$ 0 khi n $\\neq$ 2 <br\/> V\u1eady \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 $\\dfrac{4}{2n - 4}$ l\u00e0 ph\u00e2n s\u1ed1 l\u00e0 n $\\neq$ 2 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. $n \\neq 2$","column":2}]}],"id_ques":1440}],"lesson":{"save":0,"level":2}}