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