basic mathematical symbol

Edit Answers
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Across
  1. 2. ppb
  2. 3. {}
  3. 5. /
  4. 6. √
  5. 7. ppm
  6. 8. divison
  7. 14. .
  8. 17. ()
  9. 18. ppt
  10. 19. multiply
Down
  1. 1. >
  2. 4. inequality
  3. 5. ^
  4. 9. equality
  5. 10. ∛
  6. 11. subtraction
  7. 12. <
  8. 13. addition
  9. 15. %
  10. 16. exponent