1+1=
1+2=
1+3=
1+4=
1+5=
1+6=
1+7=
1+8=
1+9=
2+1=
2+2=
2+3=
2+4=
2+5=
2+6=
2+7=
2+8=
3+1=
3+2=
3+3=
3+4=
3+5=
3+6=
3+7=
4+1=
4+2=
4+3=
4+4=
4+5=
4+6=
5+1=
5+2=
5+3=
5+4=
5+5=
6+1=
6+2=
6+3=
6+4=
7+1=
7+2=
7+3=
8+1=
8+2=
9+1=
1-1=
2-2=
2-1=1
3-3=
3-2=
3-1=
4-4=
4-3=
4-2=
4-1=
5-5=
5-4=
5-3=
5-2=
5-1=
6-6=
6-5=
6-4=
6-3=
6-2=
6-1=
7-7=
7-6=
7-5=
7-4=
7-3=
7-2=
7-1=
8-8=
8-7=
8-6=
8-5=
8-4=
8-3=
8-2=
8-1=
9-9=
9-8=
9-7=
9-6=
9-5=
9-4=
9-3=
9-2=
9-1=
10-9=
10-8=
10-7=
10-6=
10-5=
10-4=
10-3=
10-2=
10-1=
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