5.5.5.1和7.7.3.3算24点可以用加,减,乘,除,及括号.

问题描述:

5.5.5.1和7.7.3.3算24点
可以用加,减,乘,除,及括号.

5 × (5 - 1 ÷ 5)
5 × (5 - (1 ÷ 5))
(5 - 1 ÷ 5) × 5
(5 - (1 ÷ 5)) × 5
7 × (3 ÷ 7 + 3)
7 × ((3 ÷ 7) + 3)
7 × (3 + 3 ÷ 7)
7 × (3 + (3 ÷ 7))
(3 ÷ 7 + 3) × 7
((3 ÷ 7) + 3) × 7
(3 + 3 ÷ 7) × 7
(3 + (3 ÷ 7)) × 7

5 × (5 - 1 ÷ 5) =24
7 × (3 ÷ 7 + 3) =24