题目内容
(+2)+(-3)=______;(-
)+(-
)=______.
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| 2 |
| 1 |
| 3 |
(1)原式=2-3=-1;
(2)原式=-
-
=-
-
=-
.
故答案为:-1;-
.
(2)原式=-
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| 2 |
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| 3 |
| 6 |
| 2 |
| 6 |
| 5 |
| 6 |
故答案为:-1;-
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