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{"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}}

Điểm của bạn.

Câu hỏi này theo dạng chọn đáp án đúng, sau khi đọc xong câu hỏi, bạn bấm vào một trong số các đáp án mà chương trình đưa ra bên dưới, sau đó bấm vào nút gửi để kiểm tra đáp án và sẵn sàng chuyển sang câu hỏi kế tiếp

Trả lời đúng trong khoảng thời gian quy định bạn sẽ được + số điểm như sau:
Trong khoảng 1 phút đầu tiên + 5 điểm
Trong khoảng 1 phút -> 2 phút + 4 điểm
Trong khoảng 2 phút -> 3 phút + 3 điểm
Trong khoảng 3 phút -> 4 phút + 2 điểm
Trong khoảng 4 phút -> 5 phút + 1 điểm

Quá 5 phút: không được cộng điểm

Tổng thời gian làm mỗi câu (không giới hạn)

Điểm của bạn.

Bấm vào đây nếu phát hiện có lỗi hoặc muốn gửi góp ý