题目内容
计算：(-4)
+
=______．
| a |
| 2 |
| 3 |
| a |
(-4)
+
=（-4+
）
=（-
+
）
=-
．
故答案为：-
．
| a |
| 2 |
| 3 |
| a |
| 2 |
| 3 |
| a |
| 12 |
| 3 |
| 2 |
| 3 |
| a |
| 10 |
| 3 |
| a |
故答案为：-
| 10 |
| 3 |
| a |
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题目内容
| a |
| 2 |
| 3 |
| a |
| a |
| 2 |
| 3 |
| a |
| 2 |
| 3 |
| a |
| 12 |
| 3 |
| 2 |
| 3 |
| a |
| 10 |
| 3 |
| a |
| 10 |
| 3 |
| a |
