算两道24点的题目！

（5-1/5）*5
(4-4/7)*7

5*(5-1/5)=24
7*(4-4/7)=24

http://www.dffy.com/tool/24.htm

5 × (5 - 1 ÷ 5)=24
5 × (5 - (1 ÷ 5))=24
(5 - 1 ÷ 5) × 5=24
(5 - (1 ÷ 5)) × 5=24
(4 - 4 ÷ 7) × 7=24
(4 - (4 ÷ 7)) × 7=24
7 × (4 - 4 ÷ 7)=24
7 × (4 - (4 ÷ 7))=24
参考资料:heep://www.dffy.com/tool/24.htm

5*(5-1/5)=24
(3 + 3 ÷ 7) × 7

5*(5-1/5)=24
7*(4-4/7)=24

5*(5-1/5)=24
7*(4-4/7)=24