13 - 7 = 10 - 4 = 6
17 - 8 = 10 - 1 = 9
16 - 7 = 10 - 1 = 9
14 - 9 = 10 - 5 = 5
3 - 6 = 10 - 13 = - 3
13 - 8 = 10 - 5 = 5
13-7=10-4=6 14-5=10-1=9
17-8=10-1=9 3-6=10-13=-3
14-7=10-3=7 13-8=10-5=5
15-7=10-2=8
16-7=10-1=9
14-9=10-5=5
13 - 7 = 10 - 4 = 6
17 - 8 = 10 - 1 = 9
16 - 7 = 10 - 1 = 9
14 - 9 = 10 - 5 = 5
3 - 6 = 10 - 13 = - 3
13 - 8 = 10 - 5 = 5
13-7=10-4=6 14-5=10-1=9
17-8=10-1=9 3-6=10-13=-3
14-7=10-3=7 13-8=10-5=5
15-7=10-2=8
16-7=10-1=9
14-9=10-5=5