1
10+4=
2
16+1=
3
10+9=
4
2-1=
5
10-1=
6
16-1=
7
19-1=
8
2-2=
9
2+2=
10
4+2=
11
4-2=
12
8-2=
13
8+2=
14
11+1=
15