7-4=
3
5+7=
12
16
5-3=
2
6+9=
15
9-6=
7+8=
#,20,25,30
15-6=
9
7
9+8=
17
13,16,#,22
19
10-7=
7+7=
14
22,#,26,28
24
11-5=
6
8+6=
15,18,21,#
Press F11 Select menu option View > Enter Fullscreen for full-screen mode