20+30
50
30-15
15
1+3+5
9
3x3
10+14
24
18-12
6
2+2+6
10
4x6
8+5
13
50-15
35
10+9+8
27
10x8
80
45+15
60
27-19
8
12+5+2
19
6x5
30
99+28
127
31-17
14
12+15+3
11x9
99