Basic Math Symbols

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Across
  1. 2. <
  2. 3. ()
  3. 6. approximately equal
  4. 9. √a
  5. 14. =, equal
  6. 16. ppt
  7. 17. /
  8. 18. ‰
  9. 20. minus, negative
Down
  1. 1. %
  2. 4. ^ power
  3. 5. ≠, not equal
  4. 7. remainder
  5. 8. a^b
  6. 10. +, positive
  7. 11. *, product
  8. 12. [], expression inside first
  9. 13. decimal point
  10. 15. ppb
  11. 19. >