1: 10 + 10 ÷ 10 + 13
2: (10 + 10 ÷ 10) + 13
3: (10 + (10 ÷ 10)) + 13
4: 10 + (10 ÷ 10) + 13
5: 10 + (10 ÷ 10 + 13)
6: 10 + ((10 ÷ 10) + 13)
7: 10 ÷ 10 + 10 + 13
8: (10 ÷ 10) + 10 + 13
9: (10 ÷ 10 + 10) + 13
10: ((10 ÷ 10) + 10) + 13
11: 10 ÷ 10 +(10 + 13)
12: (10 ÷ 10) + (10 + 13)
13: 10 ÷ 10 + 13 + 10
14: (10 ÷ 10) + 13 + 10
15: (10 ÷ 10 + 13) + 10
16: ((10 ÷ 10) + 13) + 10
17: 10 ÷ 10 +(13 + 10)
18: (10 ÷ 10) + (13 + 10)
19: 10 + 13 + 10 ÷ 10
20: (10 + 13) + 10 ÷ 10
21: 10 + (13 + 10 ÷ 10)
22: 10 + (13 + (10 ÷ 10))
23: 10 + 13 +(10 ÷ 10)
24: (10 + 13) + (10 ÷ 10)
25: 13 + 10 + 10 ÷ 10
26: (13 + 10) + 10 ÷ 10
27: 13 + (10 + 10 ÷ 10)
28: 13 + (10 + (10 ÷ 10))
29: 13 + 10 +(10 ÷ 10)
30: (13 + 10) + (10 ÷ 10)
31: 13 + 10 ÷ 10 + 10
32: (13 + 10 ÷ 10) + 10
33: (13 + (10 ÷ 10)) + 10
34: 13 + (10 ÷ 10) + 10
35: 13 + (10 ÷ 10 + 10)
36: 13 + ((10 ÷ 10) + 10)
这个网址上专门算的
参考资料:http://www.dffy.com/tool/24.htm