12+8
20
17-7
10
80/10
8
0x901
0
11+17
28
48+2
50
56-13
43
45/9
5
5x5
25
1x100
100
23+17
40
79-35
44
49/7
7
6x9
54
14/7
2
29+43
72
23-21
28/4
9x3
27
11x3
33
249+24
273
371-69
302
56/7
8x9
52-12