Across
- 4. six combined with seven
- 5. one plus one plus one
- 6. seven plus twelve
- 7. four plus two plus six
- 9. eleven combined with ten
- 10. twelve plus twelve
- 11. two combined with two
- 12. six plus three
Down
- 1. nine plus eight
- 2. seven combined with eight
- 3. six combined with one
- 7. seven combined with three
- 8. nine plus nine
- 10. twenty plus ten