题目内容
计算:
(1)(-
x7y5)÷(-3x2y)2;
(2)(
x2y-4xy2-5x2y2)÷(
xy);
(3)3a2x3÷(
ax)•(-4a5x3)÷(6a2x5);
(4)(9x4y5-1.5x3y4)÷(-3xy2)2.
(1)(-
2 |
3 |
(2)(
2 |
9 |
2 |
3 |
(3)3a2x3÷(
1 |
3 |
(4)(9x4y5-1.5x3y4)÷(-3xy2)2.
(1)原式=(-
x7y5)÷(9x4y2)
=-
x3y3;
(2)原式=
x-6y-
xy;
(3)原式=3a2x3÷
ax•(-4a5x3)÷(6a2x5)
=9ax2•(-4a5x3)÷(6a2x5)
=-6a4;
(4)原式=(9x4y5-1.5x3y4)÷(9x2y4)
=x2y-
x.
2 |
3 |
=-
2 |
27 |
(2)原式=
1 |
3 |
15 |
2 |
(3)原式=3a2x3÷
1 |
3 |
=9ax2•(-4a5x3)÷(6a2x5)
=-6a4;
(4)原式=(9x4y5-1.5x3y4)÷(9x2y4)
=x2y-
1 |
6 |
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