题目内容
计算:
(1)
-2
-(-
);
(2)(
a
+6a
)-(b
-a2
).
(1)
1
|
| 3 |
| 1 |
| 2 |
| 10 |
(2)(
| 2 |
| 3 |
| 9a |
|
|
|
(1)原式=-
•2
•
=-4
;
(2)原式=2a
+6
-2
+a
=3a
+4
.
2
| ||
| 5 |
| 3 |
| ||
| 2 |
| 3 |
(2)原式=2a
| a |
| ab |
| ab |
| a |
| a |
| ab |
练习册系列答案
相关题目