{"segment":[{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> T\u00ecm c\u0103n b\u1eadc hai c\u1ee7a 49 ","select":["A. 7 ","B. $\\pm 7$ ","C. 98 ","D. 2401"],"hint":"M\u1ed9t s\u1ed1 d\u01b0\u01a1ng a c\u00f3 hai c\u0103n b\u1eadc hai l\u00e0 $\\sqrt{a}$ v\u00e0 $-\\sqrt{a}$","explain":" C\u0103n b\u1eadc hai c\u1ee7a 49 l\u00e0 $ 7$ v\u00e0 $-7.$ V\u00ec ta c\u00f3: $7^2 = (- 7)^{2} = 49$ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":4}]}],"id_ques":401},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> Ch\u1ecdn c\u00e2u \u0111\u00fang trong c\u00e1c c\u00e1ch vi\u1ebft sau: ","select":["A. $\\sqrt{9} = 3 $ ","B. $\\sqrt{9} = -3 $ ","C. $-\\sqrt{9} = 3 $ ","D. $\\sqrt{9} = \\pm 3 $ "],"explain":" Ta c\u00f3: $\\sqrt{9} = 3 $ (v\u00ec 3 > 0 v\u00e0 $3^{2} = 9$) <br\/> $-\\sqrt{9} = -3 $ v\u00ec (-3 < 0 v\u00e0 $(-3)^{2} = 9$) <br\/>Suy ra k\u1ebft qu\u1ea3 \u0111\u00fang l\u00e0: $\\sqrt{9} = 3 $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span><\/span> ","column":2}]}],"id_ques":402},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> T\u00ecm $x$ bi\u1ebft: $\\sqrt{x} = 2 $ ","select":["A. $ x = 2 $ ","B. $ x = 1 $","C. $ x = 4 $","D. $ x = 8 $"],"hint":"\u00c1p d\u1ee5ng: N\u1ebfu $\\sqrt{x} = a (a \\geq 0)$ th\u00ec $x = a^{2}$ ","explain":" Ta c\u00f3 $\\sqrt{x} = 2 \\Rightarrow x = 2^{2} = 4 $ <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> ","column":2}]}],"id_ques":403},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> Trong c\u00e1c s\u1ed1 sau \u0111\u00e2y s\u1ed1 n\u00e0o kh\u00f4ng c\u00f3 c\u0103n b\u1eadc hai? ","select":["A. $ 0$ ","B. $-25$","C. $1$","D. $25 $"],"hint":" \u0110\u1ec3 s\u1ed1 $a$ c\u00f3 c\u0103n b\u1eadc hai th\u00ec $a \\geq 0 $","explain":" V\u00ec $-25$ < 0 n\u00ean $-25$ kh\u00f4ng c\u00f3 c\u0103n b\u1eadc hai. <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":4}]}],"id_ques":404},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> S\u1ed1 $\\sqrt{144}$ b\u1eb1ng: ","select":["A. 72 ","B. -72","C. 12","D. -14"],"explain":" Ta c\u00f3 $\\sqrt{144} = 12$ (v\u00ec $12^{2} = 144$) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span> ","column":4}]}],"id_ques":405},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> C\u0103n b\u1eadc hai s\u1ed1 h\u1ecdc c\u1ee7a 36 b\u1eb1ng: _input_","hint":"C\u0103n b\u1eadc hai s\u1ed1 h\u1ecdc c\u1ee7a a l\u00e0 $\\sqrt{a}$","explain":" Ta c\u00f3 $\\sqrt{36} = 6$ (v\u00ec 6 > 0 v\u00e0 $6^{2} = 36$) <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 6 <\/span><\/span>"}]}],"id_ques":406},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["3"],["4"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> Gi\u00e1 tr\u1ecb c\u1ee7a $ \\sqrt{\\dfrac{25}{16} - 1}$ =<div class=\"frac123\"><div class=\"ts\">_input_<\/div><div class=\"ms\">_input_<\/div><\/div>","explain":" Ta c\u00f3 $\\sqrt{\\dfrac{25}{16} - 1} = \\sqrt{\\dfrac{9}{16}} = \\dfrac{3}{4},$ v\u00ec $\\dfrac{3}{4} > 0$ v\u00e0 $\\left(\\dfrac{3}{4}\\right)^{2} = \\dfrac{9}{16}$ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 $\\dfrac{3}{4}$. <\/span><\/span>"}]}],"id_ques":407},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> T\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 \u0111\u01b0\u1ee3c k\u00ed hi\u1ec7u l\u00e0: ","select":["A. $\\mathbb{Q}$ ","B. $\\mathbb{I}$ ","C. $\\mathbb{Z}$ "],"hint":" Xem l\u1ea1i kh\u00e1i ni\u1ec7m s\u1ed1 v\u00f4 t\u1ec9.","explain":"T\u1eadp h\u1ee3p c\u00e1c s\u1ed1 v\u00f4 t\u1ec9 \u0111\u01b0\u1ee3c k\u00ed hi\u1ec7u l\u00e0 $\\mathbb{I}$ . <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span><span class='basic_left'> <u> Nh\u1eafc l\u1ea1i: <\/u> <br\/> $\\mathbb{Q}$ : K\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 h\u1eefu t\u1ec9 (l\u00e0 c\u00e1c s\u1ed1 c\u00f3 d\u1ea1ng $\\dfrac{a}{b}$) <br\/> $\\mathbb{Z}$ : K\u00ed hi\u1ec7u t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean (bao g\u1ed3m ..., -2, -1, 0, 1, 2...)<\/span> ","column":3}]}],"id_ques":408},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> $\\sqrt{17}$ l\u00e0 s\u1ed1 v\u00f4 t\u1ec9 \u0111\u00fang hay sai? ","select":["A. \u0110\u00fang ","B. Sai "],"hint":" S\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n.","explain":"Ta c\u00f3: $\\sqrt{17} = 4,1231056...$ l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> Suy ra $\\sqrt{17}$ l\u00e0 s\u1ed1 v\u00f4 t\u1ec9. <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n l\u00e0 \u0110\u00fang. <\/span><\/span> ","column":2}]}],"id_ques":409},{"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/lop7/toan/daiso/bai9/lv1/img\/2.jpg' \/><\/center> Trong c\u00e1c s\u1ed1 sau, s\u1ed1 n\u00e0o l\u00e0 s\u1ed1 v\u00f4 t\u1ec9? ","select":["A. $ \\sqrt{36}$ ","B. $\\dfrac{5}{13}$ ","C. $0,21(3)$ "],"hint":" S\u1ed1 v\u00f4 t\u1ec9 l\u00e0 s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n.","explain":" Ta c\u00f3: A. $ \\sqrt{36} = 6$: l\u00e0 s\u1ed1 nguy\u00ean <br\/> B. $\\dfrac{5}{13} = 0,384615...$ l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n kh\u00f4ng tu\u1ea7n ho\u00e0n. <br\/> C. 0,21(3): l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n v\u00f4 h\u1ea1n tu\u1ea7n ho\u00e0n. <br\/> V\u1eady $\\dfrac{5}{13}$ l\u00e0 s\u1ed1 v\u00f4 t\u1ec9. <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span> ","column":3}]}],"id_ques":410},{"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":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c M = 14,61 - 7,15? <br\/> (K\u1ebft qu\u1ea3 l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng \u0111\u01a1n v\u1ecb) ","select":["A. 6 ","B. 7","C. 8"],"hint":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a M r\u1ed3i \u00e1p d\u1ee5ng quy t\u1eafc l\u00e0m tr\u00f2n s\u1ed1 ","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: M = 14,61 - 7,15 = 7,46 <br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 7,46 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 7. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 4 (nh\u1ecf h\u01a1n 5) n\u00ean ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. <br\/> Ta \u0111\u01b0\u1ee3c $7,46 \\approx 7 $ (l\u00e0m tr\u00f2n \u0111\u1ebfn ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb)<br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":3}]}],"id_ques":411},{"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":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c M = 7,56 . 5,173? <br\/> (K\u1ebft qu\u1ea3 l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng \u0111\u01a1n v\u1ecb) ","select":["A. 38 ","B. 39","C. 40"],"hint":"T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a M r\u1ed3i \u00e1p d\u1ee5ng quy t\u1eafc l\u00e0m tr\u00f2n s\u1ed1 ","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span> <br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/> <br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: M = 7,56 . 5,173 = 39,10788 <br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 39,10788 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 9. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 1 (nh\u1ecf h\u01a1n 5) n\u00ean ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. <br\/> Ta \u0111\u01b0\u1ee3c $39,10788 \\approx 39 $ (l\u00e0m tr\u00f2n \u0111\u1ebfn ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb)<br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span> ","column":3}]}],"id_ques":412},{"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":"L\u00e0m tr\u00f2n s\u1ed1 5,4 \u0111\u1ebfn h\u00e0ng \u0111\u01a1n v\u1ecb ta \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0:_input_","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 5,4 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 5. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 4 (nh\u1ecf h\u01a1n 5) n\u00ean ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. <br\/> Ta \u0111\u01b0\u1ee3c $5,4 \\approx 5 $ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 5. <\/span><\/span>"}]}],"id_ques":413},{"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":" L\u00e0m tr\u00f2n s\u1ed1 3686 \u0111\u1ebfn h\u00e0ng ch\u1ee5c ta \u0111\u01b0\u1ee3c: ","select":["A. 3680 ","B. 3600","C. 3690"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 3686 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c l\u00e0 8. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 6 (l\u1edbn h\u01a1n 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 8. <br\/> V\u00ec 3686 l\u00e0 s\u1ed1 nguy\u00ean n\u00ean ta thay ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i b\u1eb1ng s\u1ed1 0. <br\/> Ta \u0111\u01b0\u1ee3c $ 3686 \\approx 3690 $ (l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng ch\u1ee5c) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span>","column":3}]}],"id_ques":414},{"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":" L\u00e0m tr\u00f2n s\u1ed1 3695 \u0111\u1ebfn h\u00e0ng tr\u0103m ta \u0111\u01b0\u1ee3c: ","select":["A. 3600 ","B. 3700","C. 3500"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 3695 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 6. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 9 (l\u1edbn h\u01a1n 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 6. <br\/> V\u00ec 3695 l\u00e0 s\u1ed1 nguy\u00ean n\u00ean ta thay ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i b\u1eb1ng s\u1ed1 0. <br\/> Ta \u0111\u01b0\u1ee3c $ 3695 \\approx 3700 $ (l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng tr\u0103m) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span><\/span>","column":3}]}],"id_ques":415},{"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":" L\u00e0m tr\u00f2n s\u1ed1 3695 \u0111\u1ebfn h\u00e0ng ngh\u00ecn ta \u0111\u01b0\u1ee3c: ","select":["A. 3000 ","B. 3700","C. 4000"],"explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 3695 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ngh\u00ecn l\u00e0 3. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 6 (l\u1edbn h\u01a1n 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 3. <br\/> V\u00ec 3695 l\u00e0 s\u1ed1 nguy\u00ean n\u00ean ta thay ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i b\u1eb1ng s\u1ed1 0. <br\/> Ta \u0111\u01b0\u1ee3c $ 3695 \\approx 4000 $ (l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng ngh\u00ecn) <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span><\/span>","column":3}]}],"id_ques":416},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["8,5"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"L\u00e0m tr\u00f2n s\u1ed1 8,45 \u0111\u1ebfn ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 nh\u1ea5t ta \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0: _input_","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 8,45 c\u00f3 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 nh\u1ea5t l\u00e0 4. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 5 (b\u1eb1ng 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 4. <br\/> Ta \u0111\u01b0\u1ee3c $8,45 \\approx 8,5 $ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 8,5. <\/span><\/span>"}]}],"id_ques":417},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["6,1"]]],"list":[{"point":5,"width":50,"type_input":"","ques":"L\u00e0m tr\u00f2n s\u1ed1 6,092 \u0111\u1ebfn ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 nh\u1ea5t ta \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0: _input_","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 6,092 c\u00f3 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 nh\u1ea5t l\u00e0 0. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 9 (l\u1edbn h\u01a1n 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 0. <br\/> Ta \u0111\u01b0\u1ee3c $6,092 \\approx 6,1 $ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 6,1. <\/span><\/span>"}]}],"id_ques":418},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["17,42"]]],"list":[{"point":5,"width":70,"type_input":"","ques":"L\u00e0m tr\u00f2n s\u1ed1 17,418 \u0111\u1ebfn ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 hai ta \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0: _input_","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 17,418 c\u00f3 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 hai l\u00e0 1. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 8 (l\u1edbn h\u01a1n 5) n\u00ean ph\u1ea3i c\u1ed9ng th\u00eam 1 v\u00e0o 1. <br\/> Ta \u0111\u01b0\u1ee3c $17,418 \\approx 17,42 $ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 17,42. <\/span><\/span>"}]}],"id_ques":419},{"time":24,"part":[{"title":"\u0110i\u1ec1n \u0111\u00e1p \u00e1n \u0111\u00fang v\u00e0o \u00f4 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["7,92"]]],"list":[{"point":5,"width":90,"type_input":"","ques":"L\u00e0m tr\u00f2n s\u1ed1 7,923 \u0111\u1ebfn ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 hai ta \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 l\u00e0: _input_","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> Quy \u01b0\u1edbc l\u00e0m tr\u00f2n s\u1ed1 <\/b> <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i nh\u1ecf h\u01a1n 5 th\u00ec ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <br\/> * N\u1ebfu ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean trong c\u00e1c ch\u1eef s\u1ed1 b\u1ecb b\u1ecf \u0111i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng 5 th\u00ec c\u1ed9ng th\u00eam 1 v\u00e0o ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. Trong tr\u01b0\u1eddng h\u1ee3p s\u1ed1 nguy\u00ean th\u00ec ta thay c\u00e1c ch\u1eef s\u1ed1 b\u1ecf \u0111i b\u1eb1ng c\u00e1c ch\u1eef s\u1ed1 0. <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta nh\u1eadn th\u1ea5y s\u1ed1 7,923 c\u00f3 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n th\u1ee9 hai l\u00e0 2. <br\/> Ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean b\u1ecb b\u1ecf \u0111i l\u00e0 3 (nh\u1ecf h\u01a1n 5) n\u00ean ta gi\u1eef nguy\u00ean b\u1ed9 ph\u1eadn c\u00f2n l\u1ea1i. <br\/> Ta \u0111\u01b0\u1ee3c $7,923 \\approx 7,92 $ <br\/> <br\/> <span class='basic_pink'> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 7,92. <\/span><\/span>"}]}],"id_ques":420}],"lesson":{"save":0,"level":1}}