{"segment":[{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["2"],["3"],["8"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{1}{2}$ = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">4<\/div><\/div> = <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">6<\/div><\/div> = <div class=\"frac123\"><div class=\"ts\">4<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a ph\u00e2n s\u1ed1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 ta c\u00f3: <br\/> +) V\u00ec $\\dfrac{1}{2} = \\dfrac{?}{4}$ <br\/> M\u00e0 ta c\u00f3: 2 . 2 = 4 n\u00ean $\\dfrac{1}{2} = \\dfrac{1 . 2}{2 . 2} = \\dfrac{2}{4}$ <br\/> +) V\u00ec $\\dfrac{1}{2} = \\dfrac{?}{6}$ <br\/> M\u00e0 ta c\u00f3: 2 . 3 = 6 n\u00ean $\\dfrac{1}{2} = \\dfrac{1 . 3}{2 . 3} = \\dfrac{3}{6}$ <br\/> +) V\u00ec $\\dfrac{1}{2} = \\dfrac{4}{?}$ <br\/> M\u00e0 ta c\u00f3: 1 . 4 = 4 n\u00ean $\\dfrac{1}{2} = \\dfrac{1 . 4}{2 . 4} = \\dfrac{4}{8}$ <br\/> <br\/> <span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 2; 3; 8 <\/span> <br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: <\/b> Ta c\u00f3 th\u1ec3 vi\u1ebft v\u00f4 s\u1ed1 ph\u00e2n s\u1ed1 b\u1eb1ng ph\u00e2n s\u1ed1 \u0111\u00e3 cho b\u1eb1ng c\u00e1ch nh\u00e2n ho\u1eb7c chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi c\u00f9ng m\u1ed9t s\u1ed1 nguy\u00ean kh\u00e1c 0 <\/i> <\/span> "}]}],"id_ques":1451},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["4"],["30"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> $\\dfrac{12}{15}$ =<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">5<\/div><\/div>= <div class=\"frac123\"><div class=\"ts\">24<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a ph\u00e2n s\u1ed1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 ta c\u00f3: <br\/> +) V\u00ec $\\dfrac{12}{15} = \\dfrac{?}{5}$ <br\/> M\u00e0 ta c\u00f3: 15 : 3 = 5 n\u00ean $\\dfrac{12}{15} = \\dfrac{12 : 3}{15 : 3} = \\dfrac{4}{5}$ <br\/> +) V\u00ec $\\dfrac{12}{15} = \\dfrac{24}{?}$ <br\/> M\u00e0 ta c\u00f3: 12 . 2 = 24 n\u00ean $\\dfrac{12}{15} = \\dfrac{12 . 2}{15 . 2} = \\dfrac{24}{30}$ <br\/> <span class='basic_pink'>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 4; 30 <\/span> "}]}],"id_ques":1452},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["6"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{-12}{18}$ cho _input_ ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 $\\dfrac{-2}{3}$ ","hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a ph\u00e2n s\u1ed1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{-12}{18} = \\dfrac{-12 : 6}{18 : 6} = \\dfrac{-2}{3}$ <br\/> V\u1eady chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{-12}{18}$ cho <span class='basic_pink'> 6<\/span> ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 $\\dfrac{-2}{3}$ "}]}],"id_ques":1453},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["-5"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"H\u00e3y \u0111i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o \u00f4 tr\u1ed1ng <br\/> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{125}{45}$ cho _input_ ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 $\\dfrac{-25}{-9}$ ","hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a ph\u00e2n s\u1ed1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{125}{45} = \\dfrac{125 : (-5)}{45 : (-5)} = \\dfrac{-25}{-9}$ <br\/> V\u1eady chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{125}{45}$ cho <span class='basic_pink'> -5<\/span> ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 $\\dfrac{-25}{-9}$ "}]}],"id_ques":1454},{"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/bai30/lv1/img\/1.png' \/><\/center> <br\/> 12 ph\u00fat b\u1eb1ng:","select":["A. $\\dfrac{1}{5}$ gi\u1edd","B. $\\dfrac{1}{6}$ gi\u1edd","C. $\\dfrac{1}{3}$ gi\u1edd","D. $\\dfrac{2}{3}$ gi\u1edd"],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec 1 gi\u1edd = 60 ph\u00fat <br\/> N\u00ean 12 ph\u00fat = $\\dfrac{12}{60} = \\dfrac{12 : 12}{60 : 12} = \\dfrac{1}{5}$ gi\u1edd <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. $\\dfrac{1}{5}$ gi\u1edd<\/span>","column":2}]}],"id_ques":1455},{"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/bai30/lv1/img\/3.jpg' \/><\/center> <br\/> $30cm^2$ b\u1eb1ng:","select":["A. $\\dfrac{3}{1}dm^2$","B. $\\dfrac{30}{10}dm^2$ ","C. $\\dfrac{3}{10}dm^2$ ","D. $\\dfrac{3}{100}dm^2$"],"hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec $1dm^2= 100cm^2$ <br\/> N\u00ean $30cm^2 = \\dfrac{30}{100} = \\dfrac{30 : 10}{100 : 10} = \\dfrac{3}{10}dm^2$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $\\dfrac{3}{10}dm^2$ <\/span>","column":2}]}],"id_ques":1456},{"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/bai30/lv1/img\/2.jpg' \/><\/center> <br\/> R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 $\\dfrac{21}{24}$ ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1: ","select":["A. $\\dfrac{7}{8}$","B. $\\dfrac{3}{4}$ ","C. $\\dfrac{3}{8}$ ","D. $\\dfrac{7}{6}$"],"hint":"\u0110\u1ec3 r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 ta chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 cho m\u1ed9t \u01b0\u1edbc chung kh\u00e1c 1 v\u00e0 -1 c\u1ee7a ch\u00fang","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Nh\u1eadn th\u1ea5y c\u00e1c ph\u00e2n s\u1ed1 trong \u0111\u00e1p \u00e1n \u0111\u1ec1u l\u00e0 c\u00e1c ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n, n\u00ean ta r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 $\\dfrac{21}{24}$ v\u1ec1 ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afCLN(21, 24) <br\/> <b> B\u01b0\u1edbc 2: <\/b> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{21}{24}$ cho \u01afCLN <br\/> <b> B\u01b0\u1edbc 3: <\/b> Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> Ta c\u00f3: \u01afCLN(21, 24) = 3 <br\/> $\\dfrac{21}{24} = \\dfrac{21 : 3}{24 : 3} = \\dfrac{7}{8}$ <br\/> Sau khi r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 $\\dfrac{21}{24}$ ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 $\\dfrac{7}{8}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. $\\dfrac{7}{8}$ <\/span> <br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: Khi r\u00fat g\u1ecdn ph\u00e2n s\u1ed1, th\u00f4ng th\u01b0\u1eddng ta r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 \u0111\u00f3 \u0111\u1ebfn t\u1ed1i gi\u1ea3n <br\/> +) Chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 cho \u01afCLN c\u1ee7a ch\u00fang ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <\/i><\/span>","column":2}]}],"id_ques":1457},{"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/bai30/lv1/img\/2.jpg' \/><\/center> <br\/> R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 $\\dfrac{25}{100}$ ta \u0111\u01b0\u1ee3c ph\u00e2n s\u1ed1: ","select":["A. $\\dfrac{1}{24}$","B. $\\dfrac{4}{25}$ ","C. $\\dfrac{5}{25}$ ","D. $\\dfrac{1}{4}$"],"hint":"\u0110\u1ec3 r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 ta chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 cho m\u1ed9t \u01b0\u1edbc chung kh\u00e1c 1 v\u00e0 -1 c\u1ee7a ch\u00fang","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> T\u00ecm \u01afC(25; 100) (ch\u1ec9 t\u00ecm c\u00e1c \u01b0\u1edbc d\u01b0\u01a1ng) <br\/> <b> B\u01b0\u1edbc 2: <\/b> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{25}{100}$ cho c\u00e1c \u01b0\u1edbc chung kh\u00e1c 1 \u0111\u1ec3 \u0111\u01b0\u1ee3c c\u00e1c ph\u00e2n s\u1ed1 m\u1edbi <br\/> <b> B\u01b0\u1edbc 3: <\/b> Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> Ta c\u00f3: \u01afC(25, 100) = {1; 5; 25}, (v\u00ec \u0111\u00e1p \u00e1n ch\u1ec9 g\u1ed3m c\u00e1c ph\u00e2n s\u1ed1 d\u01b0\u01a1ng n\u00ean ta ch\u1ec9 t\u00ecm c\u00e1c \u01b0\u1edbc d\u01b0\u01a1ng) <br\/> $\\dfrac{25}{100} = \\dfrac{25 : 5}{100 : 5} = \\dfrac{5}{20}$ <br\/> $\\dfrac{25}{100} = \\dfrac{25 : 25}{100 : 25} = \\dfrac{1}{4}$ <br\/> Sau khi r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 $\\dfrac{25}{100}$ ta \u0111\u01b0\u1ee3c c\u00e1c ph\u00e2n s\u1ed1 $\\dfrac{1}{4}; \\dfrac{5}{20}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. $\\dfrac{1}{4}$ <\/span> ","column":2}]}],"id_ques":1458},{"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/bai30/lv1/img\/4.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n trong c\u00e1c ph\u00e2n s\u1ed1 sau: ","select":["A. $\\dfrac{3}{5}$","B. $\\dfrac{2}{-6}$ ","C. $\\dfrac{12}{15}$ ","D. $\\dfrac{-4}{8}$"],"hint":"Ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0 ph\u00e2n s\u1ed1 m\u00e0 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 ch\u1ec9 c\u00f3 \u01b0\u1edbc chung l\u00e0 1 v\u00e0 -1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u00ecm \u01afC c\u1ee7a t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a t\u1eebng ph\u00e2n s\u1ed1 <br\/> Ch\u1ecdn ra ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0 ph\u00e2n s\u1ed1 m\u00e0 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 ch\u1ec9 c\u00f3 \u01b0\u1edbc chung l\u00e0 1 v\u00e0 -1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec \u01afC(3, 5) = {-1; 1} n\u00ean <b> ph\u00e2n s\u1ed1 $\\dfrac{3}{5}$ l\u00e0 ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <\/b> <br\/> V\u00ec \u01afC(2; -6) = {-1; 1; -2; 2} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{2}{-6}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> V\u00ec \u01afC(12, 15) = {-1; 1; 3; -3} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{12}{15}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> V\u00ec \u01afC(-4, 8) = {-1; 1; -2; 2; -4; 4} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{-4}{8}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> <span class='basic_pink'> V\u1eady ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0: A. $\\dfrac{3}{5}$ <\/span> ","column":2}]}],"id_ques":1459},{"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/bai30/lv1/img\/4.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n trong c\u00e1c ph\u00e2n s\u1ed1 sau: ","select":["A. $\\dfrac{-5}{10}$","B. $\\dfrac{3}{-11}$ ","C. $\\dfrac{-7}{-28}$ ","D. $\\dfrac{2}{8}$"],"hint":"Ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0 ph\u00e2n s\u1ed1 m\u00e0 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 ch\u1ec9 c\u00f3 \u01b0\u1edbc chung l\u00e0 1 v\u00e0 -1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> T\u00ecm \u01afC c\u1ee7a t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a t\u1eebng ph\u00e2n s\u1ed1 <br\/> Ch\u1ecdn ra ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0 ph\u00e2n s\u1ed1 m\u00e0 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 ch\u1ec9 c\u00f3 \u01b0\u1edbc chung l\u00e0 1 v\u00e0 -1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec \u01afC(-5, 10) = {-1; 1; -5; 5} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{-5}{10}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> V\u00ec \u01afC(3, -11) = {-1; 1} n\u00ean <b> ph\u00e2n s\u1ed1 $\\dfrac{3}{-11}$ l\u00e0 ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <\/b> <br\/> V\u00ec \u01afC(-7, -28) = {-1; 1; -7; 7} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{-7}{-28}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> V\u00ec \u01afC(2, 8) = {-1; 1; -2; 2} n\u00ean ph\u00e2n s\u1ed1 $\\dfrac{2}{8}$ ch\u01b0a t\u1ed1i gi\u1ea3n <br\/> <span class='basic_pink'> V\u1eady ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n l\u00e0: B. $\\dfrac{3}{-11}$ <\/span> ","column":2}]}],"id_ques":1460},{"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"],["10"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai30/lv1/img\/10.jpg' \/><\/center> <br\/> R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 sau \u0111\u1ebfn ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <br\/> $\\dfrac{3 . 21}{14 . 15}$ = <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> Vi\u1ebft 21 = 3 . 7; 14 = 2 . 7; 15 = 3 . 5 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 cho c\u00e1c th\u1eeba s\u1ed1 gi\u1ed1ng nhau \u1edf t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 l\u00e0 (3 . 7) <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{3 . 21}{14 . 15} = \\dfrac{3 . 3 . 7}{2 . 7 . 3 . 5} = \\dfrac{(3 . 3. 7) : (3 . 7)}{(2 . 7 . 3 . 5) : (3 . 7)} = \\dfrac{3}{2 . 5} = \\dfrac{3}{10}$ <br\/> <span class='basic_green'> <i> Nh\u1eadn x\u00e9t: Khi r\u00fat g\u1ecdn ph\u00e2n s\u1ed1 ta th\u01b0\u1eddng bi\u1ebfn \u0111\u1ed5i t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ecf ph\u00e2n s\u1ed1 \u0111\u00f3 \u0111\u1ec3 xu\u1ea5t hi\u1ec7n nh\u00e2n t\u1eed chung, sau \u0111\u00f3 chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 cho nh\u00e2n t\u1eed chung \u0111\u00f3 <\/i><\/span> "}]}],"id_ques":1461},{"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":[[["1"],["4"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai30/lv1/img\/10.jpg' \/><\/center> <br\/> R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 sau \u0111\u1ebfn ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n <br\/> $\\dfrac{(-3) . 5 . (-7)}{6 . 7 . 10}$ = <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> Vi\u1ebft 6 = 2 . 3; 10 = 2 . 5 <br\/> <b> B\u01b0\u1edbc 2: <\/b> Chia c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 cho c\u00e1c th\u1eeba s\u1ed1 gi\u1ed1ng nhau \u1edf t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 l\u00e0 (3 . 5. 7) <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{(-3) . 5 . (-7)}{6 . 7 . 10} = \\dfrac{(-3) . 5 . (-7)}{2 . 3 . 7 . 2 . 5} = \\dfrac{((-3) . 5. (-7)) : (3 . 5 . 7)}{(2 . 3 . 7 . 2 . 5) : (3 . 5 . 7)} = \\dfrac{(-1) . (-1)}{2 . 2} = \\dfrac{1}{4}$ "}]}],"id_ques":1462},{"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/bai30/lv1/img\/8.jpg' \/><\/center> <br\/> T\u00ecm x bi\u1ebft $\\dfrac{x}{7} = \\dfrac{24}{28}$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: ","select":["A. x = 4","B. x = 6 ","C. x = 5 ","D. x = 7"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u1edbi b\u00e0i n\u00e0y \u0111\u1ec3 t\u00ecm x ta c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau ho\u1eb7c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec $\\dfrac{x}{7} = \\dfrac{24}{28}$, c\u00f3 7 . 4 = 28 <br\/> N\u00ean theo t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1: $\\dfrac{x . 4}{7 . 4} = \\dfrac{24}{28}$ <br\/> $\\Rightarrow$ x . 4 = 24 hay x = 6 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang: B. x = 6 <\/span> ","column":2}]}],"id_ques":1463},{"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/bai30/lv1/img\/8.jpg' \/><\/center> <br\/> T\u00ecm x bi\u1ebft $\\dfrac{x}{81} = \\dfrac{2}{9}$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: ","select":["A. x = 9","B. x = 8 ","C. x = 16 ","D. x = 18"],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> V\u1edbi b\u00e0i n\u00e0y \u0111\u1ec3 t\u00ecm x ta c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m ph\u00e2n s\u1ed1 b\u1eb1ng nhau ho\u1eb7c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> V\u00ec $\\dfrac{x}{81} = \\dfrac{2}{9}$, c\u00f3 81 : 9 = 9 <br\/> N\u00ean theo t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1: $\\dfrac{x : 9}{81 : 9} = \\dfrac{2}{9}$ <br\/> $\\Rightarrow$ x : 9 = 2 hay x = 18 <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang: D. x = 18 <\/span> ","column":2}]}],"id_ques":1464},{"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/bai30/lv1/img\/12.jpg' \/><\/center> <br\/> H\u00e3y ch\u1ecdn ph\u00e2n s\u1ed1 kh\u00f4ng b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{-3}{5}$ trong c\u00e1c ph\u00e2n s\u1ed1 sau: ","select":["A. $\\dfrac{-6}{10}$","B. $\\dfrac{21}{-35}$ ","C. $\\dfrac{-15}{20}$ ","D. $\\dfrac{-27}{45}$"],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 ho\u1eb7c \u0111\u1ecbnh ngh\u0129a ph\u00e2n s\u1ed1 b\u1eb1ng nhau","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <br\/> Ta c\u00f3: <br\/> $\\dfrac{-6}{10} = \\dfrac{-6 : 2}{10 : 2} = \\dfrac{-3}{5}$ <br\/> $\\dfrac{21}{-35} = {21 : (-7)}{-35 : (-7)} = \\dfrac{-3}{5}$ <br\/> $\\dfrac{-15}{20} = \\dfrac{-15 : 5}{20 : 5} = \\dfrac{-3}{4} \\neq \\dfrac{-3}{5}$ <br\/> $\\dfrac{-27}{45} = \\dfrac{-27 : 9}{45 : 9} = \\dfrac{-3}{5}$ <br\/> <span class='basic_pink'> V\u1eady ph\u00e2n s\u1ed1 kh\u00f4ng b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{-3}{5}$ l\u00e0: $\\dfrac{-15}{20}$ <\/span> ","column":2}]}],"id_ques":1465},{"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":[[["42"],["86"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"Ph\u00e2n s\u1ed1 n\u00e0o b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{21}{43}$ m\u00e0 c\u00f3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 \u0111\u1ec1u l\u00e0 s\u1ed1 d\u01b0\u01a1ng, c\u00f3 hai ch\u1eef s\u1ed1 l\u00e0 ph\u00e2n s\u1ed1: <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\/> <br\/> V\u00ec \u01afCLN(21, 43) = 1 <br\/> Nh\u00e2n l\u1ea7n l\u01b0\u1ee3t c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{21}{43}$ v\u1edbi 2, 3... <br\/> $\\dfrac{21}{43} = \\dfrac{21 . 2}{43 . 2} = \\dfrac{42}{86}$ <br\/> $\\dfrac{21}{43} = \\dfrac{21 . 3}{43 . 3} = \\dfrac{63}{129}$ <br\/> 129 l\u00e0 s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 <br\/> N\u00ean ph\u00e2n s\u1ed1 b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{21}{43}$ m\u00e0 c\u00f3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 \u0111\u1ec1u l\u00e0 s\u1ed1 d\u01b0\u01a1ng, c\u00f3 hai ch\u1eef s\u1ed1 l\u00e0: <span class='basic_pink'> $\\dfrac{42}{86}$ <\/span> "}]}],"id_ques":1466},{"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":[[["56"],["94"]]],"list":[{"point":5,"width":50,"ques":"Ph\u00e2n s\u1ed1 b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{28}{47}$ m\u00e0 c\u00f3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 \u0111\u1ec1u l\u00e0 s\u1ed1 d\u01b0\u01a1ng, c\u00f3 hai ch\u1eef s\u1ed1 l\u00e0 ph\u00e2n s\u1ed1: <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\/> <br\/> V\u00ec \u01afCLN(28, 47) = 1 <br\/> Nh\u00e2n l\u1ea7n l\u01b0\u1ee3t c\u1ea3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 c\u1ee7a ph\u00e2n s\u1ed1 $\\dfrac{28}{47}$ v\u1edbi 2, 3... <br\/> $\\dfrac{28}{47} = \\dfrac{28 . 2}{47 . 2} = \\dfrac{56}{94}$ <br\/> $\\dfrac{28}{47} = \\dfrac{28 . 3}{47 . 3} = \\dfrac{84}{141}$ <br\/> 141 l\u00e0 s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 <br\/> N\u00ean ph\u00e2n s\u1ed1 b\u1eb1ng ph\u00e2n s\u1ed1 $\\dfrac{28}{47}$ m\u00e0 c\u00f3 t\u1eed s\u1ed1 v\u00e0 m\u1eabu s\u1ed1 \u0111\u1ec1u l\u00e0 s\u1ed1 d\u01b0\u01a1ng, c\u00f3 hai ch\u1eef s\u1ed1 l\u00e0: <span class='basic_pink'> $\\dfrac{56}{94}$ <\/span> "}]}],"id_ques":1467},{"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":[[["-189"],["253"]]],"list":[{"point":5,"width":50,"ques":"Ph\u00e2n s\u1ed1 $\\dfrac{189}{-253}$ \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng m\u1eabu d\u01b0\u01a1ng l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Mu\u1ed1n vi\u1ebft m\u1ed9t ph\u00e2n s\u1ed1 b\u1ea5t k\u00ec t\u1eeb m\u1eabu \u00e2m th\u00e0nh ph\u00e2n s\u1ed1 b\u1eb1ng n\u00f3 v\u00e0 c\u00f3 m\u1eabu d\u01b0\u01a1ng b\u1eb1ng c\u00e1ch nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi -1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{189}{-253} = \\dfrac{189 . (-1)}{-253 . (-1)} = \\dfrac{-189}{253}$"}]}],"id_ques":1468},{"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":[[["143"],["401"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"Ph\u00e2n s\u1ed1 $\\dfrac{-143}{-401}$ \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng m\u1eabu d\u01b0\u01a1ng l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Mu\u1ed1n vi\u1ebft m\u1ed9t ph\u00e2n s\u1ed1 b\u1ea5t k\u00ec t\u1eeb m\u1eabu \u00e2m th\u00e0nh ph\u00e2n s\u1ed1 b\u1eb1ng n\u00f3 v\u00e0 c\u00f3 m\u1eabu d\u01b0\u01a1ng b\u1eb1ng c\u00e1ch nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi -1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{-143}{-401} = \\dfrac{-143 . (-1)}{-401 . (-1)} = \\dfrac{143}{401}$ "}]}],"id_ques":1469},{"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":[[["-91"],["83"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["frac"],"ques":"Ph\u00e2n s\u1ed1 $\\dfrac{91}{-83}$ \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng m\u1eabu d\u01b0\u01a1ng l\u00e0: <div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","hint":"Mu\u1ed1n vi\u1ebft m\u1ed9t ph\u00e2n s\u1ed1 b\u1ea5t k\u00ec t\u1eeb m\u1eabu \u00e2m th\u00e0nh ph\u00e2n s\u1ed1 b\u1eb1ng n\u00f3 v\u00e0 c\u00f3 m\u1eabu d\u01b0\u01a1ng b\u1eb1ng c\u00e1ch nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a ph\u00e2n s\u1ed1 \u0111\u00f3 v\u1edbi -1","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $\\dfrac{91}{-83} = \\dfrac{91 . (-1)}{-83 . (-1)} = \\dfrac{-91}{83}$ "}]}],"id_ques":1470}],"lesson":{"save":0,"level":1}}