计算:(6m³n)•(-2mn)÷(4mn²)
2个回答

(1)(6m³n)×(-2mn)÷(4mn²)

=-3m^(3+1-1)n^1+1-2)

=-3m³

(2)(4x²y-2x³)÷(-2x)²

=(4x²y-2x³)÷(4x²)

=y-1/2 x

(3)(4x²y-2x³)÷(-2x)²

=(4x²y-2x³)÷(4x²)

=y-1/2 x

(4)(1/2)的0次方×3的-2次方

=1×1/9

=1/9

(5)x²×x³+x的7次方÷x²

=x^5+x^5

=2x^5

(6)[(x-y)²+(x+y)(x-y)]÷2x

=(x²-2xy+y²+x²-y²)÷2x

=(2x²-2xy)÷2x

=x-y