\(\dfrac{5^4.20^4}{25^5.4^5}=\dfrac{\left(5.20\right)^4}{\left(25.4\right)^5}=\dfrac{100^4}{100^5}=\dfrac{1}{100}\)
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Bài 6: Lũy thừa của một số hữu tỉ (tiếp theo...)
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\(\dfrac{5^4\cdot20^4}{25^5\cdot4^5}\)
BT5: Tính giá trị biểu thức:
a) \(\dfrac{25^2\cdot4^2}{5^5\cdot\left(-2\right)^5}=\)
b) \(\dfrac{\left(0,125\right)^5\cdot\left(2,4\right)^5}{\left(-0,3\right)^5\cdot\left(0,01\right)^3}=\)
Tính
\(a.\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2;b.\left(\dfrac{3}{4}-\dfrac{5}{6}\right)^2;c.\dfrac{5^4.20^4}{25^5.4^5};c.\left(\dfrac{-10}{3}\right)^5.\left(\dfrac{-6}{5}\right)^4\)
Tính
\(\dfrac{5^4}{25^5}\).\(\dfrac{20^4}{4^5}\)=
Tính
\(\dfrac{5^4.20^4}{25^5.4^5}\)
\(\left(1+\dfrac{2}{3}-\dfrac{1}{4}\right).\left(\dfrac{4}{5}-\dfrac{3}{4}\right)^2\)
Tính :
a) \(\left(\dfrac{3}{7}+\dfrac{1}{2}\right)^2\)
b) \(\left(\dfrac{3}{4}-\dfrac{5}{6}\right)^2\)
c) \(\dfrac{5^4.20^4}{25^5.4^5}\)
d) \(\left(\dfrac{-10}{3}\right)^5.\left(\dfrac{-6}{5}\right)^4\)
Tính :
\(M=\dfrac{8^{20}+4^{20}}{4^{25}+64^5}\)
\(-\left(\dfrac{3}{5}+\dfrac{3}{4}\right)-\left(\dfrac{-3}{4}+\dfrac{2}{5}\right)\)
5^4×20^4 phần 25^5×4^5