小学趣味数学

来源:百度知道 编辑:UC知道 时间:2024/05/15 21:52:34
(4、4、4、1)、(5、5、5、1)这两组数,每一组用加、减、乘、除、算,最后要等于24.我只知道(4、4、4、1)这组是这样算的:(4+1)*4+4=24,那位能告诉我(5、5、5、1)这一组怎么算?

1: 5 × (5 - 1 ÷ 5)
2: 5 × (5 - (1 ÷ 5))
3: (5 - 1 ÷ 5) × 5
4: (5 - (1 ÷ 5)) × 5

5*(5-1/5)

4,4,4,1
1: 4 + (4 × (4 + 1))
2: 4 + 4 ×(4 + 1)
3: (4 + 4) × (4 - 1)
4: 4 + (4 + 1) × 4
5: 4 + ((4 + 1) × 4)
6: 4 + (4 × (1 + 4))
7: 4 + 4 ×(1 + 4)
8: (4 × (4 + 1)) + 4
9: 4 × (4 + 1) + 4
10: 4 + (1 + 4) × 4
11: 4 + ((1 + 4) × 4)
12: (4 + 1) × 4 + 4
13: ((4 + 1) × 4) + 4
14: (4 - 1) × (4 + 4)
15: (4 × (1 + 4)) + 4
16: 4 × (1 + 4) + 4
17: (1 + 4) × 4 + 4
18: ((1 + 4) × 4) + 4
5,5,5,1
1: 5 × (5 - 1 ÷ 5)
2: 5 × (5 - (1 ÷ 5))
3: (5 - 1 ÷ 5) × 5
4: (5 - (1 ÷ 5)) × 5