2+2=
4
3+0=
3
9+0=
9
4+4=
0+0=
4+3=
4+2=
6
6+2=
8
1+5=
5+3=
10+5=
15
7+5=
12
15+1=
16+1=
17
2+3=
5
17+3=
14+5=
19
10+10=
9+10=
11+6
16
Press F11 Select menu option View > Enter Fullscreen for full-screen mode