题目内容
计算:
①4
-
+
-
; ②(
+
)(
-
)-
•
.
①4
| 3 |
| 20 |
| 5 |
| 27 |
| a |
| 2 |
| a |
| 2 |
| a2b |
|
①原式=4
-2
+
-3
=
-
;
②原式=a-2-a
×
=a-2-a=-2.
| 3 |
| 5 |
| 5 |
| 3 |
| 3 |
| 5 |
②原式=a-2-a
| b |
| ||
| b |
练习册系列答案
相关题目
题目内容
| 3 |
| 20 |
| 5 |
| 27 |
| a |
| 2 |
| a |
| 2 |
| a2b |
|
| 3 |
| 5 |
| 5 |
| 3 |
| 3 |
| 5 |
| b |
| ||
| b |