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