题目内容

计算:
(1)(-
2
3
x7y5)÷(-3x2y)2

(2)(
2
9
x2y-4xy2-5x2y2)÷(
2
3
xy)

(3)3a2x3÷(
1
3
ax)•(-4a5x3)÷(6a2x5)

(4)(9x4y5-1.5x3y4)÷(-3xy22
(1)原式=(-
2
3
x7y5)÷(9x4y2
=-
2
27
x3y3

(2)原式=
1
3
x-6y-
15
2
xy;

(3)原式=3a2x3÷
1
3
ax•(-4a5x3)÷(6a2x5
=9ax2•(-4a5x3)÷(6a2x5
=-6a4

(4)原式=(9x4y5-1.5x3y4)÷(9x2y4
=x2y-
1
6
x.
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