24点题目:使用数字 1 5 7 11,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30个解(使用交换律变换后算一个解),
难度系数是2星
★★☆☆☆☆☆☆【
简单24点题目
】。
| 序号 |
题目:1,5,7,11 |
| 1 |
((7 × 5) × 1) − 11 |
| 2 |
((7 × 5) − 11) × 1 |
| 3 |
((11 + 1) + 5) + 7 |
| 4 |
((11 + 5) + 1) + 7 |
| 5 |
((11 + 5) + 7) + 1 |
| 6 |
((7 + 5) + 11) + 1 |
| 7 |
((7 + 5) + 1) + 11 |
| 8 |
((11 + 7) + 1) + 5 |
| 9 |
((7 × 1) × 5) − 11 |
| 10 |
((11 + 1) + 7) + 5 |
| 11 |
((7 + 1) + 5) + 11 |
| 12 |
((11 + 7) + 5) + 1 |
| 13 |
(11 + 7) + (5 + 1) |
| 14 |
(7 × (5 × 1)) − 11 |
| 15 |
(7 + 5) + (11 + 1) |
| 16 |
(7 + (5 + 1)) + 11 |
| 17 |
(7 × 5) − (11 × 1) |
| 18 |
(11 + 5) + (7 + 1) |
| 19 |
(11 + (7 + 1)) + 5 |
| 20 |
(11 + 1) × (7 − 5) |
| 21 |
(11 + 1) + (7 + 5) |
| 22 |
(5 + 1) × (11 − 7) |
| 23 |
(11 + (5 + 1)) + 7 |
| 24 |
((7 ÷ 1) × 5) − 11 |
| 25 |
((7 × 5) − 11) ÷ 1 |
| 26 |
((7 × 5) ÷ 1) − 11 |
| 27 |
(7 × 5) − (11 ÷ 1) |
| 28 |
(7 × (5 ÷ 1)) − 11 |
| 29 |
(7 ÷ (1 ÷ 5)) − 11 |
| 30 |
(5 ÷ (1 ÷ 7)) − 11 |