(212 . 14 . 125) :353 .6
K
Khách
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11 tháng 4 2023
\(=\dfrac{2^{12}\cdot3^4\left(3-1\right)}{2^{12}\cdot3^6}-\dfrac{5^{10}\cdot7^3\left(1-7\right)}{5^9\cdot7^3+5^9\cdot7^3\cdot2^3}\)
\(=\dfrac{-2}{9}-\dfrac{5\cdot\left(-6\right)}{9}=\dfrac{-2-5\cdot\left(-6\right)}{9}=\dfrac{-2+30}{9}=\dfrac{28}{9}\)
BV
1
26 tháng 2 2018
Dãy trên có 108 số số hạng
C = (2+4-6-8)+(10+12-14-16)+........+(210+212-214-216)
C= (-8)+(-8)+........+(-8)
C= (-8) x 108
C= (-864)
PT
1
CM
1 tháng 6 2017
a, 265 814 + 353 548
b, 946 495 – 473859
c, 428 x 125
d, 72 450 : 23
CN
2
NC
4
13 tháng 3 2021
- Ta có : `6/25=(6.5)/(25.5)=30/125`
`14/125<30/125`
`=> 14/125<6/25`
N
1
7 tháng 12 2017
/-314/= 314 ; /+125 / = 125
Ta có : ( - 216 ) < ( - 212 ) < 0 < 125 < ( + 127 ) < 314
Vậy sắp xếp các số theo thứ tự tăng dần là : -216 ; ( - 212 ) ; 0 ; / +125/ ; ( + 127 ) ; / - 314 /
4 tháng 7 2016
A=(212.14.125):(355.6)
A=(441.14.125):(355.6)
A=771750:(355.6)
A=\(\frac{3}{1225}\)
NK
13 tháng 11 2021
25 + 25 + 25 + 25 + 25 + 25 +25 + 25=25x8=200
45 + 45 + 45 + 45 + 15 + 15 + 15 + 15=(45x4)+(15x4)=180+60=240
23 tháng 3 2019
\(2018\times\frac{3}{4}+2018\times\frac{1}{4}-2018\)
\(=2018\times\left(\frac{3}{4}+\frac{1}{4}-1\right)\)
\(=2018\times0=0\)
B-a:tương tự bài A
b,\(\frac{14}{18}\times\frac{8}{5}-\frac{7}{9}\times\frac{3}{5}\)
\(=\frac{7}{9}\times\frac{8}{5}-\frac{7}{9}\times\frac{3}{5}\)
\(=\frac{7}{9}\times\left(\frac{8}{5}-\frac{3}{5}\right)\)
\(=\frac{7}{9}\times1=\frac{7}{9}\)\
thanks
23 tháng 3 2019
B-a,\(\frac{3\times125+3\times125}{6\times43+6\times57}=\frac{2\times3\times125}{6\times\left(43+57\right)}\)
\(=\frac{3\times250}{6\times100}=\frac{5}{2\times2}=\frac{5}{4}\)
thanks
\(\frac{21^2.14.125}{35^3.6}\)
\(=\frac{7^2.3^2.2.7.5^3}{7^3.5^3.2.3}\)
\(=\frac{7^3.3^2.2.5^3}{7^3.5^3.2.3}\)
\(=3\)
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