1,5,5,5和3,3,7,7运用混合运算=24如2,2,8,8 =（8-2）×（8÷2）=243,3,7,7= =24

1,5,5,5和3,3,7,7运用混合运算=24如2,2,8,8 =（8-2）×（8÷2）=243,3,7,7= =24
1,5,5,5和3,3,7,7运用混合运算=24
如2,2,8,8 =（8-2）×（8÷2）=24
3,3,7,7= =24

1,5,5,5和3,3,7,7运用混合运算=24如2,2,8,8 =（8-2）×（8÷2）=243,3,7,7= =24
(5-1/5)×5＝24
(3+3/7)×7＝24

1: (5 - 1 ÷ 5) × 5
2: (5 - (1 ÷ 5)) × 5
3: 5 × (5 - 1 ÷ 5)
4: 5 × (5 - (1 ÷ 5))
1: (3 + 3 ÷ 7) × 7
2: (3 + (3 ÷ 7)) × 7
3: (3 ÷ 7 + 3) × 7
4: ((3 ÷ 7) + 3) × 7
5: 7 × (3 + 3 ÷ 7)
6: 7 × (3 + (3 ÷ 7))
7: 7 × (3 ÷ 7 + 3)
8: 7 × ((3 ÷ 7) + 3)