题目内容
计算:
(1)5
-9
+
;
(2)(3+2
)2-(4+
)(4-
).
(1)5
| 12 |
|
| 1 |
| 2 |
| 48 |
(2)(3+2
| 5 |
| 5 |
| 5 |
(1)原式=10
-3
+2
=9
;
(2)原式=9+12
+20-(16-5)
=9+12
+20-11
=18+12
.
| 3 |
| 3 |
| 3 |
=9
| 3 |
(2)原式=9+12
| 5 |
=9+12
| 5 |
=18+12
| 5 |
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