题目内容
计算:
(1)
•
÷
(2)(
)•(
)÷(
)
(3)(
)2•(
)3
(4)(
)3÷(b-a)2•(
)2
(5)(-
)2•(
)3
(6)(
)÷(-ab4)•(
)3.
(1)
2x2y |
3mn2 |
5m2n |
4xy2 |
5xym |
3n |
(2)(
a2 |
-b |
c2 |
-ab |
bc |
a |
(3)(
2x |
3y |
3y |
4x |
(4)(
a-b |
ab |
ab |
b-a |
(5)(-
2a |
b2 |
b2 |
4a4 |
(6)(
a |
b |
b2 |
a |
(1)原式=
•
•
=
•
=
;
(2)原式=
•
=
;
(3)原式=
•
=
;
(4)原式=
•
•
=
•
=
;
(5)原式=
•
=
;
(6)原式=
•
•
=
•
=-
.
2x2y |
3mn2 |
5m2n |
4xy2 |
3n |
5xym |
=
5xm |
6ny |
3n |
5xym |
=
1 |
2y2 |
(2)原式=
ac2 |
b2 |
a |
bc |
=
a2c |
b3 |
(3)原式=
4x2 |
9y2 |
27y3 |
64x3 |
=
3y |
16x |
(4)原式=
(a-b)3 |
a3b3 |
1 |
(a-b)2 |
a2b2 |
(a-b)2 |
=
a-b |
a3b3 |
a2b2 |
(a-b)2 |
=
1 |
(a-b)ab |
(5)原式=
4a2 |
b4 |
b6 |
64a12 |
=
b5 |
16a10 |
(6)原式=
a |
b |
1 |
-ab4 |
b6 |
a3 |
=
1 |
-b5 |
b6 |
a3 |
=-
b |
a3 |
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