一种方法,明天就要交作业!3-7813注意是-7啊-7,只用一种方法,我财富不多,please啦~

Answer 1

3*13+(-7)-8
一堆都行
1: 3 × 13 -(7 + 8)
2: (3 × 13) - (7 + 8)
3: 3 × 13 - 7 - 8
4: (3 × 13) - 7 - 8
5: (3 × 13 - 7) - 8
6: ((3 × 13) - 7) - 8
7: 3 × 13 -(8 + 7)
8: (3 × 13) - (8 + 7)
9: 3 × 13 - 8 - 7
10: (3 × 13) - 8 - 7
11: (3 × 13 - 8) - 7
12: ((3 × 13) - 8) - 7
13: 8 × (13 - (3 + 7))
14: 8 × (13 - 3 - 7)
15: 8 × ((13 - 3) - 7)
16: 8 × (13 - (7 + 3))
17: 8 × (13 - 7 - 3)
18: 8 × ((13 - 7) - 3)
19: (13 - (3 + 7)) × 8
20: (13 - 3 - 7) × 8
21: ((13 - 3) - 7) × 8
22: 13 × 3 -(7 + 8)
23: (13 × 3) - (7 + 8)
24: 13 × 3 - 7 - 8
25: (13 × 3) - 7 - 8
26: (13 × 3 - 7) - 8
27: ((13 × 3) - 7) - 8
28: 13 × 3 -(8 + 7)
29: (13 × 3) - (8 + 7)
30: 13 × 3 - 8 - 7
31: (13 × 3) - 8 - 7
32: (13 × 3 - 8) - 7
33: ((13 × 3) - 8) - 7
34: (13 - (7 + 3)) × 8
35: (13 - 7 - 3) × 8
36: ((13 - 7) - 3) × 8