下列计算正确的是( )
A.6a2b3÷(3a2b-2ab2)=2b2-3ab B.[12a3+(-6a2)]÷(-3a)=-4a2-2a
C.(-xy2-3x)÷(-2x)=y2+ D.[(-4x2y)-2xy2]÷2xy=-2x+y
计算:[2(3x2)2-48x3+6x]÷(-6x)等于( )
A.3x3-8x2 B.-3x3+8x2 C.-3x3+8x2-1 D.-3x3-8x2-1
如果(3x2y-2xy2)÷m=-3x+2y,则单项式m为( )
A.xy B.-xy C.x D.-y
( )·(-a2x2)=-5a;
(1)a2bx3÷a2x=_________;
(2)3a2b2c÷(-a2b2)=________;
判断题(对的打“∨”,错的打“×”)
(1)-4ab2÷2ab=2b;( )
(2)12a2b3c÷6ab2=2ab;( )