问题
解答题
计算:(1)(6x2y3z2)2÷4x3y4
(2)(-8×1011)×(2×103)÷(0.4×105)
(3)[xy(x2-2xy)-x2y(x-3y)]÷3x2y
答案
(1)(6x2y3z2)2÷4x3y4,
=36x4y6z4÷4x3y4,
=9xy2z4;
(2)(-8×1011)×(2×103)÷(0.4×105),
=-16×1014÷(0.4×105),
=-4×1010;
(3)[xy(x2-2xy)-x2y(x-3y)]÷3x2y,
=(x3y-2x2y2-x3y+3x2y2)÷3x2y,
=x2y2÷3x2y=
y.1 3