+ | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
6 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
7 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
8 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
9 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
- | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
12 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
13 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
14 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |
15 | (______) | (______) | (______) | (______) | (______) | (______) | (______) | (______) |