8,7,6,4使用四则运算怎样得于24
3个回答

1: (8 - 7) × 6 × 4

2: ((8 - 7) × 6) × 4

3: (8 - 7) × (6 × 4)

4: (8 - 7) × 4 × 6

5: ((8 - 7) × 4) × 6

6: (8 - 7) × (4 × 6)

7: 8 × (6 - 7 + 4)

8: 8 × ((6 - 7) + 4)

9: 8 × (6 - (7 - 4))

10: 8 × (6 + 4 - 7)

11: 8 × ((6 + 4) - 7)

12: 8 × (6 + (4 - 7))

13: 8 × (4 - 7 + 6)

14: 8 × ((4 - 7) + 6)

15: 8 × (4 - (7 - 6))

16: 8 × (4 + 6 - 7)

17: 8 × ((4 + 6) - 7)

18: 8 × (4 + (6 - 7))

19: (6 × (8 - 7)) × 4

20: 6 × (8 - 7) × 4