Across
- 3. eleven - seven
- 5. eight + four
- 6. nine + seven
- 7. ten + seven
- 11. five - five
- 14. ten - four
- 15. thirty - ten
- 18. eight - five
- 19. fourteen + five
- 21. seven + three
Down
- 1. eleven + three
- 2. twelve + six
- 4. six + one
- 8. nine + two
- 9. ten + three
- 10. six + two
- 12. thirteen + two
- 13. twelve - seven
- 16. nine - seven
- 17. three - two
- 20. five + four