题目内容
计算:
(1)(
)2÷(-
)2;
(2)(a-2b-1)-3•(2ab2)-2;
(3)
÷
•(
)2;
(4)1-
÷
.
(1)(
| x |
| 6y2 |
| x2 |
| 4y |
(2)(a-2b-1)-3•(2ab2)-2;
(3)
| m-m2 |
| m2-1 |
| m |
| m-1 |
| m+1 |
| m-1 |
(4)1-
| x-y |
| x+2y |
| x2-y2 |
| x2+4xy+4y2 |
(1)原式=(
)2×(-
)2=(
)2=
;
(2)原式=(a2b)×
(
)2=
;
(3)原式=
×
×(
)2=
;
(4)原式=
=-
=-
.
| x |
| 6y2 |
| 4y |
| x2 |
| 4xy |
| 6x2y2 |
| 4 |
| 9x2y2 |
(2)原式=(a2b)×
| 1 |
| 4 |
| 1 |
| ab2 |
| a4 |
| 4b |
(3)原式=
| m-m2 |
| m2-1 |
| m-1 |
| m |
| m+1 |
| m-1 |
| 1+m |
| 1-m |
(4)原式=
| 3y |
| x+2y |
| x2+4xy+4y2 |
| x2-y2 |
| 3y |
| 3(x+y) |
| y |
| x+y |
练习册系列答案
相关题目