Numbers

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1234567891011121314151617
Across
  1. 2. 2+4=?
  2. 4. How many eyes do you have?
  3. 5. 6+7=?
  4. 8. 3+6=?
  5. 10. 9+9=?
  6. 11. 13-6=?
  7. 12. 8+7=?
  8. 13. 2+8=?
  9. 14. 12+8=?
  10. 15. 16-8=?
  11. 16. 20-9=?
  12. 17. I come first when counting.
Down
  1. 1. 21-5=?
  2. 3. 10-6=?
  3. 5. 17-5=?
  4. 6. 23-4=?
  5. 7. 12-7=?
  6. 9. 8+9=?
  7. 12. 5+9=?
  8. 13. 12-9=?