题干
| + |
| 3 |
| 3 |
答案(点此获取答案解析）
解：原式=
+1+5﹣7
| 4 |
| 3 |
| + |
| 3 |
| 3 |
=5+1﹣2
<
| + |
| 3 |
| 3 |
| 4 |
| 3 |
| + |
| 3 |
| 3 |
