2075*18-2075*8
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Giải:
\(358.2^3-\dfrac{5^{20}.3^{20}}{15^{18}}+3^2.2075^0\)
\(=358.2^3-\dfrac{5^{20}.3^{20}}{5^{18}.3^{18}}+3^2.1\)
\(=358.2^3-5^2.3^2+3^2\)
\(=358.2^3-3^2\left(5^2+1\right)\)
\(=358.2^3-3^2.26\)
\(=2\left(358.2^2-3^2.13\right)\)
\(=2.1315=2630\)
Vậy ...
(Mình nghĩ có sai sót gì đó, bạn xem lại đề)
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2075:5=(x*75:5)+40
415=(x*15)+40
x*15=415-40
x*15=375
x=375:15
x=25
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1000+2003-2075+123 = 3003-2075+123
= 928+123
= 1051
k mk nha
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2075:5 = x x 75/ 5 +40
415 = x x 75/ 5 +40
x x 75/5= 415-40
x x75/5 =375
x x75= 375x5
x x75 = 1875
x= 1875:75
x=25
vậy x=25
x x 75 / 5 + 40 = x x 15 + 40 = 2075 : 5 = 415 => x x 15 = 415 - 40 = 375 => x = 375 : 15 = 25
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(-2)x-2 + 2011 = 2075
(-2)x-2 = 2075 - 2011 = 64 = (-2)6
=> x - 2 = 6
=> x = 8
= 2075x(18-8)
= 2075x10
= 20750
2075*18-2075*8
=2075*(18-8)
=2075*10
=20750