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