以下来自电脑
1:(1 + 1) × 9 + 6
2:((1 + 1) × 9) + 6
3:6 + (1 + 1) × 9
4:6 + ((1 + 1) × 9)
5:6 + (9 × (1 + 1))
6:6 + 9 ×(1 + 1)
7:(9 × (1 + 1)) + 6
8:9 × (1 + 1) + 6