用"2'"4""4""5"这几个数字用十种方法算24

1: (5 + 2) × 4 - 4
2: ((5 + 2) × 4) - 4
3: (5 - 2) × (4 + 4)
4: (5 × 2 - 4) × 4
5: ((5 × 2) - 4) × 4
6: (2 + 5) × 4 - 4
7: ((2 + 5) × 4) - 4
8: (2 × 5 - 4) × 4
9: ((2 × 5) - 4) × 4
10: (4 × (5 + 2)) - 4
11: 4 × (5 + 2) - 4
12: 4 × (5 × 2 - 4)
13: 4 × ((5 × 2) - 4)
14: (4 × (2 + 5)) - 4
15: 4 × (2 + 5) - 4
16: 4 × (2 × 5 - 4)
17: 4 × ((2 × 5) - 4)
18: (4 + 4) × (5 - 2)

1: (2 + 5) × 4 - 4 =24
2: ((2 + 5) × 4) - 4 =24
3: (2 × 5 - 4) × 4 =24
4: ((2 × 5) - 4) × 4 =24
5: (4 × (2 + 5)) - 4 =24
6: 4 × (2 + 5) - 4 =24
7: 4 × (2 × 5 - 4) =24
8: 4 × ((2 × 5) - 4) =24
9: (4 + 4) × (5 - 2) =24
10: (4 × (5 + 2)) - 4 =24