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