24点题目：使用数字 4 5 5 6，利用加减乘除、括号算出24。数字顺序可以任意调换，下面列出所有可行算式。
本题共有45个解（使用交换律变换后算一个解）,
难度系数是1星
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最简单入门24点题目
】。
| 序号 |
题目：4,5,5,6 |
| 1 |
((6 × 4) + 5) − 5 |
| 2 |
((6 + 5) − 5) × 4 |
| 3 |
((6 × 4) − 5) + 5 |
| 4 |
(6 × 4) − (5 − 5) |
| 5 |
(6 × 4) + (5 − 5) |
| 6 |
(6 + (5 − 5)) × 4 |
| 7 |
(6 − (5 − 5)) × 4 |
| 8 |
(5 + (6 − 5)) × 4 |
| 9 |
6 × ((5 + 4) − 5) |
| 10 |
6 × (5 − (5 − 4)) |
| 11 |
6 × (4 − (5 − 5)) |
| 12 |
6 × (4 + (5 − 5)) |
| 13 |
((6 × 5) ÷ 5) × 4 |
| 14 |
((5 × 4) × 6) ÷ 5 |
| 15 |
((6 × 4) × 5) ÷ 5 |
| 16 |
((6 × 5) × 4) ÷ 5 |
| 17 |
(6 × (5 ÷ 5)) × 4 |
| 18 |
(6 × 4) × (5 ÷ 5) |
| 19 |
(6 × 4) ÷ (5 ÷ 5) |
| 20 |
(6 ÷ (5 ÷ 5)) × 4 |
| 21 |
6 × ((5 × 4) ÷ 5) |
| 22 |
6 × (4 × (5 ÷ 5)) |
| 23 |
6 × (4 ÷ (5 ÷ 5)) |
| 24 |
(5 × (6 ÷ 5)) × 4 |
| 25 |
(5 ÷ (5 ÷ 6)) × 4 |
| 26 |
(6 × 5) × (4 ÷ 5) |
| 27 |
(5 × 4) ÷ (5 ÷ 6) |
| 28 |
(6 × 5) ÷ (5 ÷ 4) |
| 29 |
(5 × 4) × (6 ÷ 5) |
| 30 |
5 × (6 ÷ (5 ÷ 4)) |
| 31 |
5 ÷ ((5 ÷ 6) ÷ 4) |
| 32 |
4 ÷ ((5 ÷ 6) ÷ 5) |
| 33 |
5 × (4 ÷ (5 ÷ 6)) |
| 34 |
4 ÷ ((5 ÷ 5) ÷ 6) |
| 35 |
5 × (4 × (6 ÷ 5)) |
| 36 |
6 × (5 ÷ (5 ÷ 4)) |
| 37 |
6 ÷ (5 ÷ (5 × 4)) |
| 38 |
5 ÷ ((5 ÷ 4) ÷ 6) |
| 39 |
6 × (5 × (4 ÷ 5)) |
| 40 |
6 ÷ ((5 ÷ 4) ÷ 5) |
| 41 |
4 ÷ (5 ÷ (6 × 5)) |
| 42 |
5 × ((6 × 4) ÷ 5) |
| 43 |
5 × (6 × (4 ÷ 5)) |
| 44 |
5 ÷ (5 ÷ (6 × 4)) |
| 45 |
6 ÷ ((5 ÷ 5) ÷ 4) |