题目内容
计算(-4
)-(-5
)+(-4
)-(+3
)．
| 7 |
| 8 |
| 1 |
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| 1 |
| 8 |
原式=-4
+5
-4
-3
=5
+（-4
-4
-3
）
=5
-12
=-6
．
| 7 |
| 8 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
=5
| 1 |
| 2 |
| 7 |
| 8 |
| 1 |
| 4 |
| 1 |
| 8 |
=5
| 1 |
| 2 |
| 1 |
| 4 |
=-6
| 3 |
| 4 |
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