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Đáp án+Giải thích các bước giải:

`a.`

`(0,25)^3 . 32 = (1/4)^3 . 32 = 1/64 . 32 = 1/2`

`b.`

`(-0,125)^3 . 80^4 = (-1/8)^3 . (8.10)^4 = -\frac{8^4. 10^4}{8^3}=-8.10^4=-80000`

`c.`

$\dfrac{8^2 . 4 ^5}{2^{20}} = \dfrac{(2^3)^{2} . (2^2)^{5}}{2^{20}} = $ $\dfrac{2^6 . 2^{10}}{2^{20}} =$ $\dfrac{2^{16}}{2^{20}}=$ $\dfrac{1}{2^4}=$ $\dfrac{1}{16}$

`d.`

`(81^11 . 3^17)/(27^10 . 9^15)=``((3^4)^11 . 3^17)/((3^3)^10 . (3^2)^15)=(3^44 . 3^17)/(3^30 . 3^30) = (3^61)/(3^60)=3`