算算24点?如题：1 5 4 2,算算24点
1个回答

1:(5 - 1) × (4 + 2)

2:(5 - 1 + 2) × 4

3:((5 - 1) + 2) × 4

4:(5 - (1 - 2)) × 4

5:(5 - 1) × (2 + 4)

6:(5 + 2 - 1) × 4

7:((5 + 2) - 1) × 4

8:(5 + (2 - 1)) × 4

9:4 × (5 - 1 + 2)

10:4 × ((5 - 1) + 2)

11:4 × (5 - (1 - 2))

12:4 × (5 + 2 - 1)

13:4 × ((5 + 2) - 1)

14:4 × (5 + (2 - 1))

15:4 × (2 - 1 + 5)

16:4 × ((2 - 1) + 5)

17:4 × (2 - (1 - 5))

18:(4 + 2) × (5 - 1)

19:4 × (2 + 5 - 1)

20:4 × ((2 + 5) - 1)

21:4 × (2 + (5 - 1))

22:(2 - 1 + 5) × 4

23:((2 - 1) + 5) × 4

24:(2 - (1 - 5)) × 4

25:(2 + 5 - 1) × 4

26:((2 + 5) - 1) × 4

27:(2 + (5 - 1)) × 4

28:(2 + 4) × (5 - 1)

相关问题