giúp e vs ạ huhuu em cần gấp lắm r

`a) (0,25)^3 .32`

`= (1/4)^3 . 32`

`= 1/64 .32`

`= 1/2`.

`b) (-0,125)^3 .80^4`

`= ( (-1)/8 )^3 . (2^4)^4 .5^4`

`= (-1)/512 . 2^16 .5^4`

`= (-2^16)/(2^9) .5^4`

`= (-2)^7 .5^4`.

`c) (8^2 .4^5)/(2^20)`

`= ( (2^3)^2 . (2^2)^5 )/( 2^20)`

`= ( 2^6 . 2^10)/(2^20)`

`= ( 2^16)/(2^20)`

`= 1/(2^4)`

`= 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`.

$#nhatminhbuithien2010$