12-2=
11-8=
7+5=
6+7=
13-4=
16-9=
15-7=
17-8=
5+9=
14+5=
10+10=
18-0=
7+5= 8+9= 6+8= 14-8= 16-9=
11-7= 15-7= 17-9= 14-6= 5+8=
12-6= 12-3= 5+6= 13-4= 9+4=
13-5= 2+9= 16-7= 3+7= 12-5=
16-9= 18-9= 15-5= 12-3=
13-4= 11-2= 14-5= 15-6=
17-8= 12-7= 14-9= 13-5=
