题干
计算（
+
+
）﹣2×（
−
−
−
）﹣3×（
+
+
﹣
）的结果是____．
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 6 |
| 1 |
| 7 |
| 1 |
| 8 |
| 1 |
| 9 |
答案(点此获取答案解析）
﹣
| 2 |
| 3 |
