选择4个自然数,通过四则混合预算(至少写3个综合算式),使结果均是24

1, 5, 5, 5的24点答案：
1: (5 - 1 ÷ 5) × 5
2: (5 - (1 ÷ 5)) × 5
3: 5 × (5 - 1 ÷ 5)
4: 5 × (5 - (1 ÷ 5))

2, 7, 8, 9的24点答案：
1: (2 × (7 + 9)) - 8
2: 2 × (7 + 9) - 8
3: (2 × (9 + 7)) - 8
4: 2 × (9 + 7) - 8
5: (7 + 9) × 2 - 8
6: ((7 + 9) × 2) - 8
7: (9 + 7) × 2 - 8
8: ((9 + 7) × 2) - 8

4, 6, 6, 10的24点答案：
1: 6 ÷ 4 ×(6 + 10)
2: (6 ÷ 4) × (6 + 10)
3: 6 ÷ (4 ÷ (6 + 10))
4: 6 ÷ 4 ×(10 + 6)
5: (6 ÷ 4) × (10 + 6)
6: 6 ÷ (4 ÷ (10 + 6))
7: (6 × (6 + 10)) ÷ 4
8: 6 × (6 + 10) ÷ 4
9: 6 × ((6 + 10) ÷ 4)
10: (6 + 10) ÷ 4 × 6
11: ((6 + 10) ÷ 4) × 6
12: (6 + 10) ÷ (4 ÷ 6)
13: (6 + 10) × 6 ÷ 4
14: ((6 + 10) × 6) ÷ 4
15: (6 + 10) × (6 ÷ 4)
16: (6 × (10 + 6)) ÷ 4
17: 6 × (10 + 6) ÷ 4
18: 6 × ((10 + 6) ÷ 4)
19: (10 + 6) ÷ 4 × 6
20: ((10 + 6) ÷ 4) × 6
21: (10 + 6) ÷ (4 ÷ 6)
22: (10 + 6) × 6