Math crossword puzzle

12345678910111213141516171819
Across
  1. 3. A number that is not a fraction
  2. 4. To add more
  3. 5. Repeated addition
  4. 8. To take away
  5. 10. Numbers in an ordered sequence
  6. 13. One of the numbers in a multiplication problem
  7. 15. A part of a set/partial members from another set
  8. 17. Identification number
  9. 18. -12
  10. 19. Otherwise known as counting numbers.
Down
  1. 1. 35/7
  2. 2. .5
  3. 4. The distance between a number and zero.
  4. 6. The end result of a multiplication problem
  5. 7. A set and its complement
  6. 9. The process of splitting something into equal parts
  7. 11. A number that tells you the amount of something
  8. 12. Making a number shorter/simpler while keeping it close to the original number
  9. 14. A number out of 100
  10. 16. A part of a set