Numbers 0-20

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Across
  1. 2. 3 + 3 =
  2. 4. 1 + 1 =
  3. 6. 20 - 5 =
  4. 8. 10 + 10 =
  5. 10. 20 - 7 =
  6. 12. 12 - 3 =
  7. 13. 20 - 1 =
  8. 15. 20 - 9 =
  9. 17. 7 + 7 =
  10. 20. 6 - 3 =
Down
  1. 1. 9 + 9 =
  2. 3. 20 - 3 =
  3. 5. 3 - 2 =
  4. 7. 10 - 5 =
  5. 9. 8 + 8 =
  6. 10. 5 + 5 =
  7. 11. 6 + 6 =
  8. 14. 5 - 5 =
  9. 16. 2 + 2 =
  10. 18. 4 + 4 =
  11. 19. 10 - 3 =