用3,-5,8,-13算24点

1:5 × 8 -(3 + 13)
2:(5 × 8) - (3 + 13)
3:5 × 8 - 3 - 13
4:(5 × 8) - 3 - 13
5:(5 × 8 - 3) - 13
6:((5 × 8) - 3) - 13
7:5 × 8 -(13 + 3)
8:(5 × 8) - (13 + 3)
9:5 × 8 - 13 - 3
10:(5 × 8) - 13 - 3
11:(5 × 8 - 13) - 3
12:((5 × 8) - 13) - 3
13:8 × 5 -(3 + 13)
14:(8 × 5) - (3 + 13)
15:8 × 5 - 3 - 13
16:(8 × 5) - 3 - 13
17:(8 × 5 - 3) - 13
18:((8 × 5) - 3) - 13
19:8 × 5 -(13 + 3)
20:(8 × 5) - (13 + 3)
21:8 × 5 - 13 - 3
22:(8 × 5) - 13 - 3
23:(8 × 5 - 13) - 3
24:((8 × 5) - 13) - 3