| 序号 | 题目：3,4,8,12 | |
|---|---|---|
| 1 | ((12 × 3) − 8) − 4 | |
| 2 | ((12 × 3) − 4) − 8 | |
| 3 | ((12 + 4) − 8) × 3 | |
| 4 | ((8 + 4) × 3) − 12 | |
| 5 | (12 × 4) − (8 × 3) | |
| 6 | (12 × 3) − (8 + 4) | |
| 7 | (4 + (12 − 8)) × 3 | |
| 8 | (12 − (8 − 4)) × 3 | |
| 9 | 12 + ((8 − 4) × 3) | |
| 10 | ((12 × 4) ÷ 3) + 8 | |
| 11 | (4 × (12 ÷ 3)) + 8 | |
| 12 | (12 ÷ (3 ÷ 4)) + 8 | |
| 13 | (12 × (4 ÷ 3)) + 8 | |
| 14 | (4 ÷ (3 ÷ 12)) + 8 | |