+3=14 18-=12 -9=10
1619 1513 1418
10+720 18-810 1212-10
10+5= 10+3= 10+0= 14+5=
10+10= 19-6= 13+6= 16-6=
15+3= 16-4= 15+4= 16-6=
13+4= 16-2= 17-5= 19-8=
15+2= 13+2= 18-8= 17-10=