题目内容
化简与计算
(1)
-2
(2)
-
+42
(3)(2
-
)(-
-2
)
(4)(
+1)2.
(1)
| ||||
|
(2)
|
| 216 |
|
(3)(2
| 2 |
| 3 |
| 3 |
| 2 |
(4)(
| 5 |
(1)原式=
-2=
-2=3-2=1;
(2)原式=
-6
+7
=
;
(3)原式=-(2
-
)(2
+
)=-(8-3)=-5;
(4)原式=5+2
+1=6+2
.
2
| ||||
|
3
| ||
| 5 |
(2)原式=
| ||
| 3 |
| 6 |
| 6 |
4
| ||
| 3 |
(3)原式=-(2
| 2 |
| 3 |
| 2 |
| 3 |
(4)原式=5+2
| 5 |
| 5 |
练习册系列答案
相关题目