23-5= 23-9= 80-9= 60-4= 67-8= 17-8=
53-6=
27-8=
62-9=
90-9=
63-8=
45-8=
49-6=
72-5=
1
55-7= 38-9= 42-5= 69-8= 72-3= 88-9= 42-6=
57-8=
39-9=
42-7=
53-8=
23-5=
83+6=
43+7=
2
18+8= 27+6= 39+2= 73+7= 44+8= 28+4= 49+5=
36+8=
25+6=
37+8=
58+9=
23+9=
39+9=
3