题目内容
计算
(1)4
+
-
+4
;
(2)(
-1)2-(
-
)(
+
)+(
-
)0+
.
(1)4
| 5 |
| 45 |
| 8 |
| 2 |
(2)(
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| (-3)2 |
(1)原式=4
+3
-2
+4
=7
+2
;
(2)原式=2+1-2
-(2-3)+1+3
=3-2
+1+1+3
=8-2
| 5 |
| 5 |
| 2 |
| 2 |
| 5 |
| 2 |
(2)原式=2+1-2
| 2 |
=3-2
| 2 |
=8-2
| 2 |
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