BASIC MATH SYMBOLS

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Across
  1. 3. .
  2. 4. ppm
  3. 6. / it is also used for
  4. 8. ()
  5. 9. -
  6. 10. mod
  7. 11. []
  8. 14. >
  9. 17. ppt
  10. 19. ≥
  11. 20. ÷
Down
  1. 1. +
  2. 2. * it is also used for multiplication
  3. 5. ≠
  4. 7. <
  5. 12. %
  6. 13. ≤
  7. 15. 3√a
  8. 16. a²
  9. 18. ‰