1.(2a^2b)·(-1/2ab^2)^32.(-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)
问题描述：
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)
答