Spelling practice

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Across
  1. 3. 8 plus 7
  2. 4. a pair
  3. 7. fingers on both hands
  4. 11. half dozen
  5. 12. lucky clover
  6. 13. single
  7. 14. 9 plus 9
  8. 16. lucky number
  9. 17. rhymes with seven
  10. 18. 10 plus 9
  11. 20. a dozen
Down
  1. 1. rhymes with shine
  2. 2. 9 plus 8
  3. 5. nothing
  4. 6. 6 plus 7
  5. 7. tic tac toe
  6. 8. 8 plus 8
  7. 9. fingers on a hand
  8. 10. 7 plus 7
  9. 15. all fingers and toes
  10. 19. octopus