题干
计算：（
﹣
+
）×（﹣24）．
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| 2 |
| 3 |
| 4 |
| 1 |
| 8 |
答案(点此获取答案解析）
解：原式=
×（﹣24）﹣
×（﹣24）+
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 8 |
| 1 |
| 2 |
| 3 |
| 4 |
