16 - 3 = _____ | 17 - 8 = _____ |
12 - 9 = _____ | 20 - 15 = _____ |
11 - 1 = _____ | 18 - 2 = _____ |
17 - 2 = _____ | 18 - 1 = _____ |
15 - 12 = _____ | 14 - 12 = _____ |
14 - 8 = _____ | 12 - 4 = _____ |
14 - 14 = _____ | 19 - 3 = _____ |
20 - 7 = _____ | 13 - 1 = _____ |
16 - 6 = _____ | 19 - 8 = _____ |
12 - 7 = _____ | 13 - 1 = _____ |