BASIC MATH SYMBOLS

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Across
  1. 3. *
  2. 5. %
  3. 8. .
  4. 11. •
  5. 13. <
  6. 15. x
  7. 16. ppb
  8. 17. ^
  9. 19. division/fraction
  10. 20. =
Down
  1. 1. ppm
  2. 2. ( )
  3. 4. mod
  4. 6. [ ]
  5. 7. ppt
  6. 9. approximation
  7. 10. /
  8. 12. -
  9. 14. less than or equal to
  10. 18. exponent