简单的3道算24点

4*(7+7/7)=24
[7-(10-9)]*4=24
5*6-(2+4)=24

4、7、7、7
4(7+7/7)=24
7、10、9、4
4(7-10+9)=24
4、5、6、2
5*6-4-2=24

(7-7/7)*4=24
(-7+9)*10+4=24
-4+5*6-2=24

1、4*(7-7/7)
2、(7-(10-9))*4
3、4*5+6-2

http://www.dffy.com/tool/24.htm
4、7、7、7
1: 4 × (7 - 7 ÷ 7)
2: 4 × (7 - (7 ÷ 7))
3: (7 - 7 ÷ 7) × 4
4: (7 - (7 ÷ 7)) × 4
7、10、9、4
1: (7 - 10 + 9) × 4
2: ((7 - 10) + 9) × 4
3: (7 - (10 - 9)) × 4
4: (7 + 9 - 10) × 4
5: ((7 + 9) - 10) × 4
6: (7 + (9 - 10)) × 4
7: (10 × (9 - 7)) + 4
8: 10 × (9 - 7) + 4
9: 10 × 4 -(7 + 9)
10: (10 × 4) - (7 + 9)
11: 10 × 4 - 7 - 9
12: (10 × 4) - 7 - 9
13: (10 × 4 - 7) - 9
14: ((10 × 4) - 7) - 9
15: 10 × 4 -(9 + 7)
16: (10 × 4) - (9 + 7)
17: 10 × 4 - 9 - 7
18: (10 × 4) - 9 -