Question

tính nhanh

(20.2⁴+12.2⁴-48.2²):8²

Answer 1

`(20.2^4+12.2^4-48.2^2):8^2`

`=(32.2^4-12.2^4):8^2`

`=[2^4.(32-12)]:8^2`

`=20.2^4:8^2`

`=20.16:64`

`=5`

Answer 2

Ta có: \(\left(20\cdot2^4+12\cdot2^4-48\cdot2^2\right):8^2\)

\(=\left(32\cdot2^4-12\cdot2^4\right):2^6\)

\(=20\cdot\dfrac{2^4}{2^6}\)

=5