Numbers to 20

1234567891011121314151617181920
Across
  1. 2. 3 - 2
  2. 4. 1 less than 15
  3. 5. 1 less than 10
  4. 7. 1 + 1
  5. 8. 10 - 4
  6. 10. 1 less than 9
  7. 12. 1 ten 8 ones
  8. 13. 15 - 5
  9. 15. 2 less than 5
  10. 18. 1 more than 10
  11. 19. 10 + 3
  12. 20. 1 more than 18
Down
  1. 1. 4 + 0
  2. 3. 17 ones
  3. 6. 8 + 8
  4. 9. 7 + 8
  5. 11. 1 ten 2 ones
  6. 14. 18 + 2
  7. 16. 2 more than 5
  8. 17. 10 - 5