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