{"segment":[{"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":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c : <br\/> $11^6 . 7^5 : (11^3 . 7^2) = ?$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: ","select":["A. $11^2.7^3$","B. $11^3.7^7$ ","C. $11^3.7^3$ "],"hint":"Ta ti\u1ebfn h\u00e0nh chia c\u00e1c l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span> <b> * Quy t\u1eafc: <\/b> <br\/> Khi chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 (kh\u00e1c 0) ta gi\u1eef nguy\u00ean c\u01a1 s\u1ed1 v\u00e0 tr\u1eeb c\u00e1c s\u1ed1 m\u0169 <br\/> $a^m : a^n = a^ {m - n} (a \\neq 0; m \\geq n)$ <br\/> <b> C\u1ee5 th\u1ec3: <\/b> Ta l\u1ea5y $(11^6: 11^3).(7^5 : 7^2)$<br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 ta c\u00f3: <br\/> $11^6 . 7^5 : (11^3 . 7^2) = (11^6 : 11^3) . (7^5 : 7^2) = 11^{6 - 3} . 7^{5 - 2} = 11^3.7^3$ <br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $11^3.7^3$<\/span> <br\/><span class='basic_green'>","column":3}]}],"id_ques":321},{"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":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c : <br\/> $7^{11} . 3^8 : (3^6 . 7^{10}) = ?$ <br\/> \u0110\u00e1p \u00e1n l\u00e0: ","select":["A. $7.3^2$","B. $7^2.3^6$ ","C. $7^{11}.3^2$ "],"hint":"Ta ti\u1ebfn h\u00e0nh chia c\u00e1c l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn: <br\/> <\/span> <b> * Quy t\u1eafc: <\/b> <br\/> Khi chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 (kh\u00e1c 0) ta gi\u1eef nguy\u00ean c\u01a1 s\u1ed1 v\u00e0 tr\u1eeb c\u00e1c s\u1ed1 m\u0169 <br\/> $a^m : a^n = a^ {m - n} (a \\neq 0; m \\geq n)$ <br\/> <b> C\u1ee5 th\u1ec3: <\/b> Ta l\u1ea5y $(7^{11}: 7^{10}).(3^8 : 3^6)$<br\/><\/span><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 ta c\u00f3: <br\/> $7^{11} . 3^8 : (3^6 . 7^{10}) = (7^{11} : 7^{10}) . (3^{8} : 3^{6}) = 7^{11 - 10} . 3^{8 - 6} = 7.3^2$ <br\/><span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. $7.3^2$<\/span> <br\/><span class='basic_green'>","column":3}]}],"id_ques":322},{"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":"T\u00ecm x bi\u1ebft: <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/6.jpg' \/><\/center> <br\/> $6x + 2.4 = 5^3:5^2 + 9$","select":["A. x = 1 ","B. x = 4","C. x = 5","D. x = 6"],"hint":" Trong bi\u1ec3u th\u1ee9c c\u00f3 l\u0169y th\u1eeba ta t\u00ednh l\u0169y th\u1eeba tr\u01b0\u1edbc. <br\/> 6x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft, mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $5^3 : 5^2 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> 6x l\u00e0 s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 h\u1ea1ng ch\u01b0a bi\u1ebft ta l\u1ea5y t\u1ed5ng tr\u1eeb \u0111i s\u1ed1 h\u1ea1ng \u0111\u00e3 bi\u1ebft <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} 6x + 2.4 &= 5^3:5^2 + 9 \\\\ 6x + 8 &= 5^{3 - 2} + 9 \\\\ 6x + 8 &= 5 + 9 \\\\ 6x &= 14 - 8 \\\\ 6x &= 6 \\\\ x &= 1 \\end{align*}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. x = 1 <\/span> ","column":2}]}],"id_ques":323},{"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":"T\u00ecm x bi\u1ebft: <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/6.jpg' \/><\/center> <br\/> $(x - 47) - 120 = 5^4 : 5^2$","select":["A. x = 47 ","B. x = 145","C. x = 192","D. x = 150"],"hint":" Trong bi\u1ec3u th\u1ee9c c\u00f3 l\u0169y th\u1eeba ta t\u00ednh l\u0169y th\u1eeba tr\u01b0\u1edbc. <br\/> x l\u00e0 s\u1ed1 b\u1ecb tr\u1eeb ch\u01b0a bi\u1ebft, mu\u1ed1n t\u00ecm s\u1ed1 b\u1ecb tr\u1eeb ta l\u1ea5y hi\u1ec7u c\u1ed9ng v\u1edbi s\u1ed1 tr\u1eeb","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $5^4 : 5^2 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> x l\u00e0 s\u1ed1 b\u1ecb tr\u1eeb ch\u01b0a bi\u1ebft <br\/> Mu\u1ed1n t\u00ecm s\u1ed1 b\u1ecb tr\u1eeb ta l\u1ea5y hi\u1ec7u c\u1ed9ng v\u1edbi s\u1ed1 tr\u1eeb <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} (x - 47) - 120 &= 5^4 : 5^2 \\\\ (x - 47) - 120 &= 5^{4 - 2} \\\\ x - 47 &= 5^2 + 120 \\\\ x - 47 &= 25 + 120 \\\\ x &= 145 + 47 \\\\ x &= 192 \\end{align*}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. x = 192 <\/span> ","column":2}]}],"id_ques":324},{"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\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean n bi\u1ebft: <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/7.jpg' \/><\/center> <br\/> $13^n: 13^2 = 13^4.13^2.13$","select":["A. n = 4 ","B. n = 9","C. n = 5","D. n = 10"],"hint":"T\u00ednh VT v\u00e0 VP theo quy t\u1eafc nh\u00e2n v\u00e0 quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 sau \u0111\u00f3 cho c\u00e1c s\u1ed1 m\u0169 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm n","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ta \u0111\u01b0a v\u1ec1 c\u00f9ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 13 \u0111\u1ec3 t\u00ecm n <br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $13^n : 13^2 = 13^?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $13^4.13^2.13 = 13^{4 + 2 + 1}$<br\/> <b> B\u01b0\u1edbc 3: <\/b> V\u00ec VT v\u00e0 VP \u0111\u1ec1u l\u00e0 l\u0169y th\u1eeba c\u01a1 s\u1ed1 13 n\u00ean cho 2 s\u1ed1 m\u0169 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm n <br\/> $a^m = a^n$ khi m = n<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Theo quy t\u1eafc nh\u00e2n v\u00e0 quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 ta c\u00f3: <br\/> $\\begin{align*} 13^n: 13^2 &= 13^4.13^2.13 \\\\ 13^{n - 2} &= 13^{4 + 2 + 1} \\\\ 13^{n - 2} &= 13^7 \\end{align*}$ <br\/> Suy ra n - 2 = 7 hay n = 9 <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. n = 9 <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $a^m = a^n; a \\neq 0; 1$ khi v\u00e0 ch\u1ec9 khi m = n <\/i><\/span> ","column":2}]}],"id_ques":325},{"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":"T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean n bi\u1ebft: <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/7.jpg' \/><\/center> <br\/> $8^{13}: 8^5 = 8^n:8^2$","select":["A. n = 8 ","B. n = 2","C. n = 6","D. n = 10"],"hint":"T\u00ednh VT v\u00e0 VP theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 sau \u0111\u00f3 cho c\u00e1c s\u1ed1 m\u0169 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm n","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Ta \u0111\u01b0a v\u1ec1 c\u00f9ng c\u01a1 s\u1ed1 8 \u0111\u1ec3 t\u00ecm n <br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $8^{13} : 8^5 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $8^n:8^2 = ?$<br\/> <b> B\u01b0\u1edbc 3: <\/b> V\u00ec VT v\u00e0 VP \u0111\u1ec1u l\u00e0 l\u0169y th\u1eeba c\u01a1 s\u1ed1 8 n\u00ean cho 2 s\u1ed1 m\u0169 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm n <br\/> $a^m = a^n$ khi m = n<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 ta c\u00f3: <br\/> $\\begin{align*} 8^{13}: 8^5 &= 8^n:8^2 \\\\ 8^{13 - 5} &= 8^{n - 2} \\\\ 8^{8} &= 8^{n - 2} \\end{align*}$ <br\/> Suy ra 8 = n - 2 hay n = 10 <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. n = 10 <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $a^m = a^n, a \\neq 0, 1$ khi v\u00e0 ch\u1ec9 khi m = n <\/i><\/span> ","column":2}]}],"id_ques":326},{"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":[[["16"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/2.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean x bi\u1ebft: $x^2 = 4^8 : 4^4$ <br\/> V\u1eady x =_input_","hint":"T\u00ednh $4^8:4^4 = ? $ sau \u0111\u00f3 bi\u1ebfn \u0111\u1ed5i VP th\u00e0nh l\u0169y th\u1eeba b\u1eadc 2 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b>T\u00ednh $4^8 : 4^4 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Bi\u1ebfn \u0111\u1ed5i VP th\u00e0nh l\u0169y th\u1eeba b\u1eadc 2 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean <br\/> <b> B\u01b0\u1edbc 3: <\/b> Cho hai c\u01a1 s\u1ed1 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm x <br\/> $x^m = a^m; a, x, m \\neq 0$ khi v\u00e0 ch\u1ec9 khi x = a<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} x^2 &= 4^8 : 4^4 \\\\ x^2 &= 4^{8 - 4} \\\\ x^2 &= 4^4 \\\\ x^2 &= 4 . 4 . 4 . 4 \\\\ x^2 &= (4 . 4). (4 . 4) \\\\ x^2 &= 16 . 16 \\\\ x^2 &= 16^2\\end{align*}$ <br\/> Suy ra: x = 16 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 16 <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $x^m = a^m; a, x , m \\neq 0 $ khi v\u00e0 ch\u1ec9 khi x = a <\/i> <\/span>"}]}],"id_ques":327},{"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":[[["25"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/2.jpg' \/><\/center> <br\/> T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean x bi\u1ebft: $x^5 = 5^{15} : 5^5$ <br\/> V\u1eady x =_input_","hint":"T\u00ednh $5^{15}:5^5 = ? $ sau \u0111\u00f3 bi\u1ebfn \u0111\u1ed5i VP th\u00e0nh l\u0169y th\u1eeba b\u1eadc 2 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b>T\u00ednh $5^{15} : 5^5 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Bi\u1ebfn \u0111\u1ed5i VP th\u00e0nh l\u0169y th\u1eeba b\u1eadc 5 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean <br\/> <b> B\u01b0\u1edbc 3: <\/b> Cho hai c\u01a1 s\u1ed1 b\u1eb1ng nhau \u0111\u1ec3 t\u00ecm x <br\/> $x^m = a^m; a, x, m \\neq 0$ khi v\u00e0 ch\u1ec9 khi x = a<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*} x^5 &= 5^{15} : 5^5 \\\\ x^5 &= 5^{15 - 5} \\\\ x^5 &= 5^{10} \\\\ x^5 &= 5^{5 + 5} \\\\ x^5 &= 5^5.5^5 \\\\ x^5 &= (5 . 5)^5 \\\\ x^5 &= 25^5\\end{align*}$ <br\/> Suy ra: x = 25 <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 25 <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $x^m = a^m; a, x , m \\neq 0 $ khi v\u00e0 ch\u1ec9 khi x = a <br\/> L\u0169y th\u1eeba c\u1ee7a m\u1ed9t t\u00edch b\u1eb1ng t\u00edch c\u00e1c l\u0169y th\u1eeba: <br\/> $ (x.y)^n = x^n . y^n$ (c\u00f4ng th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng theo chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i) <\/i> <\/span>"}]}],"id_ques":328},{"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/bai7/lv2/img\/8.jpg' \/><\/center> <br\/> $1^3 + 2^3 = ?$","select":["A. $3^2$ ","B. $4^2$","C. $5^2$"],"hint":" T\u00ednh $1^3 + 2^3 = ?$ r\u1ed3i bi\u1ebfn \u0111\u1ed5i k\u1ebft qu\u1ea3 th\u00e0nh b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> T\u00ednh $1^3 + 2^3 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Bi\u1ebfn \u0111\u1ed5i k\u1ebft qu\u1ea3 b\u01b0\u1edbc 1 th\u00e0nh b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $1^3 + 2^3 = 1 + 8 = 9$ <br\/> M\u00e0 $9 = 3 . 3 = 3^2$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. $3^2$ <\/span> ","column":3}]}],"id_ques":329},{"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/bai7/lv2/img\/8.jpg' \/><\/center> <br\/> $5^3 + 5^3 + 5^3 + 5^3 + 5^3 = ?$","select":["A. $15^2$ ","B. $35^2$","C. $25^2$","D. $12^2$"],"hint":" Bi\u1ebfn \u0111\u1ed5i $5^3 + 5^3 + 5^3 + 5^3 + 5^3$ th\u00e0nh b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <span class='basic_green'>C\u00e1ch 1:<\/span> <br\/> <b>B\u01b0\u1edbc 1: <\/b> T\u00ednh $5^3 + 5^3 + 5^3 + 5^3 + 5^3 = ?$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> Bi\u1ebfn \u0111\u1ed5i k\u1ebft qu\u1ea3 b\u01b0\u1edbc 1 th\u00e0nh b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean <br\/> <span class='basic_green'>C\u00e1ch 2: <\/span> <br\/> Bi\u1ebfn \u0111\u1ed5i $5^3 + 5^3 + 5^3 + 5^3 + 5^3 $ th\u00e0nh b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <b> C\u00e1ch 1: <\/b> <br\/> $5^3 + 5^3 + 5^3 + 5^3 + 5^3 = 125 + 125 + 125 + 125 + 125 = 625$ <br\/> M\u00e0 $625 = 5 . 5 . 5 . 5 = (5 . 5) . (5 . 5) = 25 . 25 = 25^2$ <br\/> <b> C\u00e1ch 2: <\/b> <br\/> $\\begin{align*} &5^3 + 5^3 + 5^3 + 5^3 + 5^3 \\\\ =& 5^3.(1 + 1 + 1 + 1 + 1) \\\\ =& 5^3 . 5 \\\\ =& 5^{3 + 1} \\\\ =& 5^4 \\\\ =& (5^2)^2 \\\\ =& 25^2 \\end{align*}$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. $25^2$ <\/span> ","column":2}]}],"id_ques":330},{"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":" H\u00e3y ch\u1ecdn d\u1ea5u th\u00edch h\u1ee3p thay cho d\u1ea5u <span class='basic_hoi_black'>?<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/3.jpg' \/><\/center> <br\/> $13^5 : 13^3$ <span class='basic_hoi_black'>?<\/span> $11^4 : 11$","select":["A. > ","B. <","C. ="],"hint":" T\u00ednh k\u1ebft qu\u1ea3 c\u1ee7a VP v\u00e0 VT theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 r\u1ed3i so s\u00e1nh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> \u00c1p d\u1ee5ng quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 <br\/> T\u00ednh $13^5 : 13^3 = ?$ v\u00e0 $11^4 : 11 = ?$<br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh v\u00e0 ch\u1ecdn d\u1ea5u th\u00edch h\u1ee3p<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $13^5 : 13^3 = 13^{5 - 3} = 13^2 = 169$ <br\/> $11^4 : 11 = 11^{4 - 1} = 11^3 = 11. 11 . 11 = 1331$ <br\/> M\u00e0 169 < 1331 n\u00ean $13^5 : 13^3$ < $11^4 : 11$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. < <\/span> ","column":3}]}],"id_ques":331},{"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":" H\u00e3y ch\u1ecdn d\u1ea5u th\u00edch h\u1ee3p thay cho d\u1ea5u <span class='basic_hoi_black'>?<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/3.jpg' \/><\/center> <br\/> $5^8 : 5^5$ <span class='basic_hoi_black'>?<\/span> $3^8 : 3^3$","select":["A. > ","B. <","C. ="],"hint":" T\u00ednh k\u1ebft qu\u1ea3 c\u1ee7a VP v\u00e0 VT theo quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 r\u1ed3i so s\u00e1nh","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> \u00c1p d\u1ee5ng quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng c\u01a1 s\u1ed1 <br\/> T\u00ednh $5^8 : 5^5 = ?$ v\u00e0 $3^8 : 3^3 = ?$<br\/> <b> B\u01b0\u1edbc 2: <\/b> So s\u00e1nh v\u00e0 ch\u1ecdn d\u1ea5u th\u00edch h\u1ee3p<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $5^8 : 5^5 = 5^{8 - 5} = 5^3 = 5. 5 . 5 = 125$ <br\/> $3^8 : 3^3 = 3^{8 - 3} = 3^5 = 3 . 3 . 3 . 3 . 3 = 243$ <br\/> M\u00e0 125 < 243 n\u00ean $5^8 : 5^5$ < $3^8 : 3^3$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. < <\/span> ","column":3}]}],"id_ques":332},{"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":[[["3"],["0"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["sqr"],"ques":"S\u1ed1 38125 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng t\u1ed5ng c\u00e1c l\u0169y th\u1eeba c\u1ee7a 10 l\u00e0: <br\/>38125 = 38.10<sup><input type=\"text\" class=\"bl_elm_true basic_elm basic_blank basic_blank_part \" tpl=\"fill_the_blank\" style=\"width: 20px; font-size:14px; height:15px;text-align: left;\"><\/sup>+ 125.10<sup><input type=\"text\" class=\"bl_elm_true basic_elm basic_blank basic_blank_part \" tpl=\"fill_the_blank\" style=\"width: 20px; font-size:14px; height:15px;text-align: left;\"><\/sup>","hint":"Ta t\u00e1ch s\u1ed1 38125 theo c\u1ea5u t\u1ea1o s\u1ed1 r\u1ed3i vi\u1ebft th\u00e0nh d\u1ea1ng l\u0169y th\u1eeba c\u1ee7a 10","explain":"<span class=\u2019basic_left\u2019><span class=\u2019basic_green\u2019>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Theo c\u1ea5u t\u1ea1o s\u1ed1 th\u00ec 38125 g\u1ed3m 3 ch\u1ee5c ngh\u00ecn, 8 ngh\u00ecn, 1 tr\u0103m, 2 ch\u1ee5c v\u00e0 5 \u0111\u01a1n v\u1ecb <br\/> 38125 = 30 000 + 8 000 + 100 + 20 + 5 = 38.$10^?$ + 125 .$10^?$ <\/span> <br\/><br\/> <span class=\u2019basic_green\u2019>B\u00e0i gi\u1ea3i:<\/span><br\/>S\u1ed1 38125 g\u1ed3m 3 ch\u1ee5c ngh\u00ecn, 8 ngh\u00ecn, 1 tr\u0103m, 2 ch\u1ee5c v\u00e0 5 \u0111\u01a1n v\u1ecb <br\/> $\\begin{align*} 38125 &= 30 000 + 8 000 + 100 + 20 + 5 \\\\&= 38 000 + 125 \\\\ &= 38 . 10^3 + 125.10^0 \\end{align*}$ <\/span> <br\/> <span class=\u2019basic_pink\u2019>V\u1eady s\u1ed1 m\u0169 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 3; 0<\/span>"}]}],"id_ques":333},{"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":[[["4"],["2"]]],"list":[{"point":5,"width":50,"type_input":"","input_hint":["sqr"],"ques":"S\u1ed1 42130 \u0111\u01b0\u1ee3c vi\u1ebft d\u01b0\u1edbi d\u1ea1ng t\u1ed5ng c\u00e1c l\u0169y th\u1eeba c\u1ee7a 10 l\u00e0: <br\/>42130 = 4.10<sup><input type=\"text\" class=\"bl_elm_true basic_elm basic_blank basic_blank_part \" tpl=\"fill_the_blank\" style=\"width: 20px; font-size:14px; height:15px;text-align: left;\"><\/sup> + 21.10<sup><input type=\"text\" class=\"bl_elm_true basic_elm basic_blank basic_blank_part \" tpl=\"fill_the_blank\" style=\"width: 20px; font-size:14px; height:15px;text-align: left;\"><\/sup>+ 3.10","hint":"Ta t\u00e1ch s\u1ed1 42130 theo c\u1ea5u t\u1ea1o s\u1ed1 r\u1ed3i vi\u1ebft th\u00e0nh d\u1ea1ng l\u0169y th\u1eeba c\u1ee7a 10","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Theo c\u1ea5u t\u1ea1o s\u1ed1 th\u00ec 42130 g\u1ed3m 4 ch\u1ee5c ngh\u00ecn, 2 ngh\u00ecn, 1 tr\u0103m, 3 ch\u1ee5c v\u00e0 0 \u0111\u01a1n v\u1ecb <br\/> 42130 = 40 000 + 2 000 + 100 + 30 = 4.$10^?$ + 21 . $10^?$ + 30 <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>S\u1ed1 42130 g\u1ed3m 4 ch\u1ee5c ngh\u00ecn, 2 ngh\u00ecn, 1 tr\u0103m, 3 ch\u1ee5c v\u00e0 0 \u0111\u01a1n v\u1ecb <br\/> $\\begin{align*} 42130 &= 40 000 + 2 000 + 100 + 30 \\\\&= 4. 10 . 10 . 10 . 10 + 2100 + 30 \\\\ &= 4. 10^4 + 21 . 10 . 10 + 30 \\\\ &= 4 . 10^4 + 21.10^2 + 3. 10\\end{align*}$ <\/span> <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 m\u0169 c\u1ea7n \u0111i\u1ec1n l\u1ea7n l\u01b0\u1ee3t l\u00e0: 4;2<\/span>"}]}],"id_ques":334},{"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":" $16^3 : 4^3 = 4^3$ <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG ","B. SAI"],"hint":" Bi\u1ebfn \u0111\u1ed5i $16^3$ v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 4 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chia","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <span class='basic_green'>C\u00e1ch 1:<\/span> <br\/><b> B\u01b0\u1edbc 1: <\/b> Bi\u1ebfn \u0111\u1ed5i $16^3$ v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 4 <br\/> $16^3 = (4^2)^3 = 4^?$<br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $4^? : 4^3 = ?$ r\u1ed3i so s\u00e1nh v\u1edbi \u0111\u1ec1 b\u00e0i v\u00e0 ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang <br\/> <span class='basic_green'>C\u00e1ch 2:<\/span> <br\/> \u00c1p d\u1ee5ng quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng s\u1ed1 m\u0169: <br\/> $a^m : b^m = (a : b)^m$<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> <b> C\u00e1ch 1: <\/b> <br\/> Ta c\u00f3: <br\/> $16^3 : 4^3 = (4^2)^3 : 4^3 = 4^{2 . 3} : 4^3 = 4^6 : 4^3 = 4^3$ <br\/>N\u00ean kh\u1eb3ng \u0111\u1ecbnh $16^3 : 4^3 = 4^3$ l\u00e0 <b> \u0110\u00daNG <\/b> <br\/> <b> C\u00e1ch 2: <\/b> <br\/> \u00c1p d\u1ee5ng quy t\u1eafc chia hai l\u0169y th\u1eeba c\u00f9ng s\u1ed1 m\u0169 ta c\u00f3: <br\/> $16^3 : 4^3 = (16 : 4)^3 = 4^3$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $\\begin{align*} & \\blacktriangleright (a^m)^n = a^{(m.n)} (a \\neq 0) \\\\ & \\blacktriangleright a^m : b^m = (a:b)^m (a, b \\neq 0) \\end{align*}$ <\/i><\/span>","column":2}]}],"id_ques":335},{"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":" $9^6 : 3^2 = 3^4$ <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG ","B. SAI"],"hint":" Bi\u1ebfn \u0111\u1ed5i $9^6$ v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 3 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chia","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> Bi\u1ebfn \u0111\u1ed5i $9^6$ v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 3 <br\/> $9^6 = (3^2)^6 = 3^?$<br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $3^? : 3^2 = ?$ r\u1ed3i so s\u00e1nh v\u1edbi \u0111\u1ec1 b\u00e0i v\u00e0 ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> Ta c\u00f3: <br\/> $9^6 : 3^2 = (3^2)^6 : 3^2 = 3^{2 . 6} : 3^2 = 3^{12} : 3^2 = 3^{10}$ <br\/>N\u00ean kh\u1eb3ng \u0111\u1ecbnh $9^6 : 3^2 = 3^4$ l\u00e0 <b> SAI <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: $(a^m)^n = a^(m.n)$<\/i><\/span>","column":2}]}],"id_ques":336},{"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":[[["729"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u00ednh. <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/1.png' \/><\/center> <br\/>$9^5 : 81$ =_input_","hint":"\u0110\u01b0a 81 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 9 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p chia","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b>\u0110\u01b0a 81 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 9 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chia ta \u0111\u01b0\u1ee3c $9^x$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $9^x = ?$ <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $9^5 : 81 = 9^5 : (9.9) = 9^5 : 9^2 = 9^{5 - 2} = 9^3$ <br\/> M\u00e0 $9^3 = 9 . 9 . 9 = 729$ <br\/> N\u00ean $9^5 : 81 = 729$<br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 729 "}]}],"id_ques":337},{"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":[[["16"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u00ednh. <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/1.png' \/><\/center> <br\/>$2^8 : 16$ =_input_","hint":"\u0110\u01b0a 16 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 2 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p chia","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b>\u0110\u01b0a 16 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 2 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chia ta \u0111\u01b0\u1ee3c $2^x$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $2^x = ?$ <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $2^8 : 16 = 2^8 : (2 . 2 . 2 . 2) = 2^8 : 2^4 = 2^{8 - 4} = 2^4$ <br\/> M\u00e0 $2^4 = 2 . 2 . 2 . 2= 16$ <br\/> N\u00ean $2^8 : 16 = 16$ <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 16 "}]}],"id_ques":338},{"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":[[["27"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"T\u00ednh. <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai7/lv2/img\/1.png' \/><\/center> <br\/>$3^6 : 27$ =_input_","hint":"\u0110\u01b0a 27 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 3 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p chia","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b>\u0110\u01b0a 27 v\u1ec1 d\u1ea1ng l\u0169y th\u1eeba c\u01a1 s\u1ed1 r\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chia ta \u0111\u01b0\u1ee3c $3^x$ <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh $3^x = ?$ <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $3^6 : 27 = 3^6 : (3 . 3 . 3) = 3^6 : 3^3 = 3^{6 - 3} = 3^3$ <br\/> M\u00e0 $3^3 = 3 . 3 . 3= 27$ <br\/> N\u00ean $3^6 : 27 = 27$ <br\/> <span class='basic_pink'>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0: 27 "}]}],"id_ques":339},{"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":" $2475 = 2.10^3 + 4.10^2 + 7.10 + 5.10^0$ <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG ","B. SAI"],"hint":" Ph\u00e2n t\u00edch s\u1ed1 2475 theo c\u1ea5u t\u1ea1o s\u1ed1 r\u1ed3i vi\u1ebft th\u00e0nh c\u00e1c l\u0169y th\u1eeba c\u1ee7a 10","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/><b> B\u01b0\u1edbc 1: <\/b> Ph\u00e2n t\u00edch s\u1ed1 2475 theo c\u1ea5u t\u1ea1o s\u1ed1<br\/> <b> B\u01b0\u1edbc 2: <\/b> Vi\u1ebft t\u1ed5ng tr\u00ean th\u00e0nh c\u00e1c l\u0169y th\u1eeba c\u1ee7a 10<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>S\u1ed1 2475 g\u1ed3m 2 ngh\u00ecn, 4 tr\u0103m, 7 ch\u1ee5c v\u00e0 5 \u0111\u01a1n v\u1ecb<br\/> $ \\begin{align*} 2475 &= 2.1000 + 4.100 + 7.10 + 5 \\\\ &= 2. (10 . 10 . 10) + 4. (10 . 10) + 7 . 10 + 5.1 \\\\ &= 2 . 10^3 + 4.10^2 + 7.10 + 5.10^0\\end{align*}$ <br\/>N\u00ean kh\u1eb3ng \u0111\u1ecbnh $2475 = 2.10^3 + 4.10^2 + 7.10 + 5.10^0$ l\u00e0 <b> \u0110\u00daNG <\/b> <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}],"id_ques":340}],"lesson":{"save":0,"level":2}}