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