Across
- 5. eight plus twelve
- 6. two plus thirteen
- 8. two plus nine
- 10. eleven minus nine
- 11. five minus one
- 12. thirteen minus three
- 14. four plus twelve
- 18. twelve minus seven
- 19. nine minus six
- 20. twelve minus five
Down
- 1. eleven plus three
- 2. eighteen plus one
- 3. nineteen minus seven
- 4. fourteen plus three
- 7. fifteen minus two
- 9. twenty minus twelve
- 13. three plus six
- 15. nineteen minus one
- 16. nine minus three
- 17. eight minus seven