| 序号 | 题目:3,4,4,13 | |
|---|---|---|
| 1 | ((13 + 3) + 4) + 4 | |
| 2 | ((13 − 4) − 3) × 4 | |
| 3 | ((13 + 4) + 3) + 4 | |
| 4 | ((13 − 3) − 4) × 4 | |
| 5 | ((13 + 4) + 4) + 3 | |
| 6 | (13 + (4 + 3)) + 4 | |
| 7 | (13 + (4 + 4)) + 3 | |
| 8 | (13 − (4 + 3)) × 4 | |
| 9 | (13 + 3) + (4 + 4) | |
| 10 | (13 + 4) + (4 + 3) | |
| 11 | 13 + ((4 + 4) + 3) | |
| 12 | 13 + ((4 + 3) + 4) | |