Question

5,4,2,1怎样运算等于24

Answer 1

1.（5+2-1）×4=24
2.（4+2）×（5-1）=24
3.(2 - 1 + 5) × 4
4.((2 - 1) + 5) × 4
5.(2 - (1 - 5)) × 4
6.(2 + 5 - 1) × 4
7.((2 + 5) - 1) × 4
8.(2 + (5 - 1)) × 4
9.4 × (2 - 1 + 5)
10.4 × ((2 - 1) + 5)
11.4 × (2 - (1 - 5))
12..(4 + 2) × (5 - 1)
13.4 × (2 + 5 - 1)
14.4 × ((2 + 5) - 1)
15.4 × (2 + (5 - 1))
16.4 × (5 - 1 + 2)
17.4 × ((5 - 1) + 2)
18.4 × (5 - (1 - 2))
19.4 × ((5 + 2) - 1)
20.4 × (5 + (2 - 1))
21.(5 - 1 + 2) × 4
22.((5 - 1) + 2) × 4
23.(5 - (1 - 2)) × 4
24.(5 - 1) × (2 + 4)
25.(5 - 1) × (4 + 2)
26.(5 + 2 - 1) × 4
27.((5 + 2) - 1) × 4
28.(5 + (2 - 1)) × 4

Answer 2

一共有二十八种解法。。
1:(2 - 1 + 5) × 4
2:((2 - 1) + 5) × 4
3:(2 - (1 - 5)) × 4
4:(2 + 4) × (5 - 1)
5:(2 + 5 - 1) × 4
6:((2 + 5) - 1) × 4
7:(2 + (5 - 1)) × 4
8:4 × (2 - 1 + 5)
9:4 × ((2 - 1) + 5)
10:4 × (2 - (1 - 5))
11:(4 + 2) × (5 - 1)
12:4 × (2 + 5 - 1)
13:4 × ((2 + 5) - 1)
14:4 × (2 + (5 - 1))
15:4 × (5 - 1 + 2)
16:4 × ((5 - 1) + 2)
17:4 × (5 - (1 - 2))
18:4 × (5 + 2 - 1)
19:4 × ((5 + 2) - 1)
20:4 × (5 + (2 - 1))
21:(5 - 1 + 2) × 4
22:((5 - 1) + 2) × 4
23:(5 - (1 - 2)) × 4
24:(5 - 1) × (2 + 4)
25:(5 - 1) × (4 + 2)
26:(5 + 2 - 1) × 4
27:((5 + 2) - 1) × 4
28:(5 + (2 - 1)) × 4

Answer 3

{(2-1 )+5}乘以4

Answer 4

(5+2-1)x4=24

追问

2,3,4,8怎样运算等于24

追答

2x3x(8-4)=24

Answer 5

(5-1+2)x4=24