Sebastian's Impossible Crossword

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Across
  1. 1. the answer to a division problem
  2. 2. a number written with words
  3. 4. a way to tell parts of the day
  4. 8. the opposite of billion
  5. 10. the answer to putting numbers together
  6. 11. a polygon with 12 sides
  7. 13. a line that sorts numbers in order
  8. 15. a easy way to do division
  9. 17. lines that are the same to each other
  10. 18. a number put into equal parts
Down
  1. 1. a tense of 4 used for grouping
  2. 3. a quadrilateral with parallel sides
  3. 5. the same
  4. 6. a tense of 5 used for grouping
  5. 7. a number taken apart into all place value
  6. 9. a polygon with 11 sides
  7. 12. multiplying a number by one
  8. 14. two of the same number
  9. 16. a number larger than another
  10. 19. a chart you use to organize numbers