题目内容
计算:(1)
+
-
-
;
(2)
×
+(
-1)2.
| 12 |
| 18 |
| 8 |
| 48 |
(2)
| 2 |
| 32 |
| 2 |
(1)原式=2
+3
-2
-4
=
-2
;
(2)原式=8+(
)2-2
+1
=8+2-2
+1
=11-2
.
| 3 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
(2)原式=8+(
| 2 |
| 2 |
=8+2-2
| 2 |
=11-2
| 2 |
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