BASIC MATH SYMBOLS

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Across
  1. 1. per-billion
  2. 4. ÷
  3. 11. x
  4. 14. *
  5. 15. ‰
  6. 16. a^b
  7. 17. ( )
  8. 19. remainder calculation
  9. 20. per-trillion
Down
  1. 2. both plus and minus operations
  2. 3. -
  3. 5. %
  4. 6. [ ]
  5. 7. +
  6. 8. Per-million
  7. 9. .
  8. 10. -
  9. 12. not equal sign
  10. 13. less than or equal to
  11. 18. Equal sign