第1个回答 推荐于2017-05-15
1: 8 × (9 ÷ (10 - 7))
2: 8 × 9 ÷(10 - 7)
3: (8 × 9) ÷ (10 - 7)
4: (8 ÷ (10 - 7)) × 9
5: 8 ÷ (10 - 7) × 9
6: 8 ÷ ((10 - 7) ÷ 9)
7: 9 × (8 ÷ (10 - 7))
8: 9 × 8 ÷(10 - 7)
9: (9 × 8) ÷ (10 - 7)
10: (9 ÷ (10 - 7)) × 8
11: 9 ÷ (10 - 7) × 8
12: 9 ÷ ((10 - 7) ÷ 8)本回答被提问者采纳