题目内容
计算:
(1)
+
-(
-
)
(2)(
+a
-
)÷
(3)
(4)
+|-
|-(-2006)0+(
)-1.
(1)
| 12 |
| 20 |
| 5 |
| 3 |
(2)(
| 9a |
|
| 2 |
| a |
| a3 |
| b |
(3)
1+(2+
| ||||||||
(
|
(4)
| 12 |
| 3 |
| 1 |
| 2 |
(1)原式=2
+2
-
+
=3
+
;
(2)原式=(3
+
-2
)÷
=2
÷
=
;
(3)原式=
=
=2+
;
(4)原式=2
+
-1+2
=3
+1.
| 3 |
| 5 |
| 5 |
| 3 |
=3
| 3 |
| 5 |
(2)原式=(3
| a |
| a |
| a |
| b |
=2
| a |
| b |
=
2
| ||
| b |
(3)原式=
1+4+4
| ||
| 7-3 |
=
8+4
| ||
| 4 |
=2+
| 3 |
(4)原式=2
| 3 |
| 3 |
=3
| 3 |
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