题目内容
计算:-
-(-
)=______;-5-6+7=______.
| 1 |
| 2 |
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| 2 |
-
-(-
),
=-
+
,
=1;
-5-6+7,
=-11+7,
=-4.
故答案为:1;-4.
| 1 |
| 2 |
| 3 |
| 2 |
=-
| 1 |
| 2 |
| 3 |
| 2 |
=1;
-5-6+7,
=-11+7,
=-4.
故答案为:1;-4.
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