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
(1)(6×1010)÷( )=-2×105; (2)( )·(-a2x2)=-5a;
(3)( )÷n=a-b+2c; (4)(3x3y2+x4y2-______)÷xy=_____+____-1.
计算:[(xn+1)4·x2]÷[(xn+2)3÷(x2)n].
100m÷1000n的计算结果是( )
A. B.100m-2n C.100m-n D.102m-3n
下面计算正确的是( )
A.712÷712=0 B.108÷108=0 C.b10÷b5=b5 D.m6-m6=1