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