题目内容
计算:
(
-
)-(
+
)+
;
(4
-2
)÷2
×(2+
).
(
| 24 |
|
|
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| 2 |
(4
| 2 |
| 6 |
| 2 |
| 3 |
(1)原式=2
-
-
-2
+
=2
-
;
(2)原式=(2-
)×(2+
)=4-3=1.
| 6 |
| 1 |
| 2 |
| 2 |
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| 4 |
| 2 |
| 2 |
| 2 |
| 6 |
| 7 |
| 4 |
| 2 |
(2)原式=(2-
| 3 |
| 3 |
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