24点 3 8 9 9 解题详情
24点在线计算 · 全部题目与解法
24点题目：使用数字 3 8 9 9，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 ★☆☆☆☆☆☆☆ 【 最简单入门24点题目 】
本题共有 45 个解（使用交换律变换后算一个解），难度系数 ★☆☆☆☆☆☆☆ 【 最简单入门24点题目 】
| 序号 | 题目：3,8,9,9 的解法 | |
|---|---|---|
| 1 | ((8 × 3) − 9) + 9 | |
| 2 | ((8 × 3) + 9) − 9 | |
| 3 | ((9 + 8) − 9) × 3 | |
| 4 | (9 − (9 − 8)) × 3 | |
| 5 | (8 − (9 − 9)) × 3 | |
| 6 | (8 × 3) + (9 − 9) | |
| 7 | (8 × 3) − (9 − 9) | |
| 8 | (8 + (9 − 9)) × 3 | |
| 9 | 8 × (3 − (9 − 9)) | |
| 10 | 8 × (9 − (9 − 3)) | |
| 11 | 8 × ((9 + 3) − 9) | |
| 12 | 8 × (3 + (9 − 9)) | |
| 13 | ((8 × 3) × 9) ÷ 9 | |
| 14 | ((9 × 8) × 3) ÷ 9 | |
| 15 | ((9 × 3) × 8) ÷ 9 | |
| 16 | ((9 × 8) ÷ 9) × 3 | |
| 17 | (8 × 3) ÷ (9 ÷ 9) | |
| 18 | (8 × 3) × (9 ÷ 9) | |
| 19 | (8 ÷ (9 ÷ 9)) × 3 | |
| 20 | (9 × 8) ÷ (9 ÷ 3) | |
| 21 | (8 × (9 ÷ 9)) × 3 | |
| 22 | 8 × (3 ÷ (9 ÷ 9)) | |
| 23 | 8 × ((9 × 3) ÷ 9) | |
| 24 | 8 × (3 × (9 ÷ 9)) | |
| 25 | 8 × (9 ÷ (9 ÷ 3)) | |
| 26 | (9 × (8 ÷ 9)) × 3 | |
| 27 | (9 × 3) ÷ (9 ÷ 8) | |
| 28 | (9 × 3) × (8 ÷ 9) | |
| 29 | (9 × 8) × (3 ÷ 9) | |
| 30 | (9 ÷ (9 ÷ 8)) × 3 | |
| 31 | 9 × (8 ÷ (9 ÷ 3)) | |
| 32 | 8 ÷ (9 ÷ (9 × 3)) | |
| 33 | 9 × (3 × (8 ÷ 9)) | |
| 34 | 9 ÷ (9 ÷ (8 × 3)) | |
| 35 | 9 ÷ ((9 ÷ 3) ÷ 8) | |
| 36 | 8 ÷ ((9 ÷ 9) ÷ 3) | |
| 37 | 8 ÷ ((9 ÷ 3) ÷ 9) | |
| 38 | 3 ÷ ((9 ÷ 8) ÷ 9) | |
| 39 | 9 × (3 ÷ (9 ÷ 8)) | |
| 40 | 9 × (8 × (3 ÷ 9)) | |
| 41 | 3 ÷ (9 ÷ (9 × 8)) | |
| 42 | 8 × (9 × (3 ÷ 9)) | |
| 43 | 9 × ((8 × 3) ÷ 9) | |
| 44 | 9 ÷ ((9 ÷ 8) ÷ 3) | |
| 45 | 3 ÷ ((9 ÷ 9) ÷ 8) | |