题目内容：

1.(2a^2b)·(-1/2ab^2)^3
2.(-2/5xy^2z)·(-1/2y^2z^2)
3.(2x)^3·y^3÷(16xy^2)
4.(-a^2b)^4÷(-1/2ab^2)
5.-2x^2y(3xy^2z-2y^2z)
6.(-2/3a)(1/2a^2+1/6a+1/4)
7.(x-3y)(x-1/2y)
8.(-a-3b)(7a+2b)
9.(9x-2y)(x+y)
10.(-1/3p+1/2p)(-2/3p-1/4p)
11.(-1/5a^3x^4-9/10a^2x^3)÷(-3/5ax^2)
12.(-2πr^2h+3πrh^2)÷(1/2πrh)

优质解答

1.(2a^2b)·(-1/2ab^2)^3 =2a^2b*(-1/8)a^3b^6=-(1/4)a^5b^72.(-2/5xy^2z)·(-1/2y^2z^2) =(1/5)xy^4z^33.(2x)^3·y^3÷(16xy^2) =8x^3y^3/16xy^2=(1/2)x^2y4.(-a^2b)^4÷(-1/2ab^2) =a^8b^4/(-1/2ab^2)=-(1/2)a^7b^...