Math Crossword Puzzle

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Across
  1. 5. Grown some thing
  2. 7. Only positive Numbers on a number line
  3. 8. some thing that goes up
  4. 11. Numbers that can be expressed as a fraction
  5. 12. cost some thing
  6. 14. Made money by doing something
  7. 16. two numbers when added results in 0
  8. 17. Distance between a number and 0 on a number line
  9. 18. Numbers below 0
Down
  1. 1. Putting money in the bank
  2. 2. taking away from number
  3. 3. Numbers that can be added in any order and the sum is always the same
  4. 4. Positive and Negative numbers
  5. 6. Numbers above 0
  6. 9. money built up
  7. 10. To take money out the bank
  8. 13. Something that goes down
  9. 15. the sum of numbers