Question

Thực hiện phép tính :

\(\frac{5^4.20^4}{25^5.4^5}\)

Answer 1

\(\frac{5^4.20^4}{25^5.4^5}=\frac{5^4.\left(5.2^2\right)^4}{\left(5^2\right)^5.\left(2^2\right)^5}=\frac{5^4.5^4.2^8}{5^{10}.2^{10}}=\frac{5^8.2^8}{2^{10}.2^{10}}=\frac{1}{5^2.5^2}=\frac{1}{25.4}=\frac{1}{100}\)

Answer 2

100000000

100000000000

=1/1000

Answer 3

Ê , làm thế này nhanh hơn đấy : 
 (5.20)^4/ (25.4)^5 = 100^4/100^5 = 1/100