mathmatical crossword

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Across
  1. 3. than <
  2. 8. not cool
  3. 11. 6x6
  4. 13. than >
  5. 14. please
  6. 17. dear
  7. 18. sally
  8. 19. 2+2
  9. 20. +
Down
  1. 1. geometry
  2. 2. 4x2
  3. 4. =
  4. 5. mr. vargo
  5. 6. 9+9
  6. 7. my
  7. 9. aunt
  8. 10. senior
  9. 12. excuse
  10. 15. subtract
  11. 16. 3.14