| 序号 | 题目:1,2,4,4 | |
|---|---|---|
| 1 | ((4 + 2) × 1) × 4 | |
| 2 | ((4 − 1) × 2) × 4 | |
| 3 | ((4 × 1) + 2) × 4 | |
| 4 | ((4 + 2) × 4) × 1 | |
| 5 | (4 + 2) × (4 × 1) | |
| 6 | (4 + 4) × (2 + 1) | |
| 7 | (4 + (2 × 1)) × 4 | |
| 8 | (4 × (4 − 1)) × 2 | |
| 9 | (4 × 2) × (4 − 1) | |
| 10 | ((4 + 2) ÷ 1) × 4 | |
| 11 | ((4 + 2) × 4) ÷ 1 | |
| 12 | ((4 ÷ 1) + 2) × 4 | |
| 13 | (4 + 2) × (4 ÷ 1) | |
| 14 | (4 + (2 ÷ 1)) × 4 | |
| 15 | (4 + 2) ÷ (1 ÷ 4) | |
| 16 | 4 ÷ (1 ÷ (4 + 2)) | |