计算:(1)(6x2y3z2)2÷4x3y4(2)(-8×1011)×(2×103)÷(0.4×105)(3)[xy(x2-2xy)-x2y(x-3y)]÷3x
题型:解答题难度:一般来源:不详
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. |
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