Exploring Basic Math Symbol

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Across
  1. 3. ‰
  2. 5. √a
  3. 9. The process or skill of multiplying
  4. 10. %
  5. 12. ppm
  6. 13. ≤
  7. 14. /
  8. 16. being the same in quantity, size, degree, or value
  9. 18. ( )
  10. 19. [ ]
Down
  1. 1. >
  2. 2. ppt
  3. 4. Remainder calculation
  4. 6. ÷
  5. 7. ⋅
  6. 8. ppb
  7. 11. ≠
  8. 15. +
  9. 17. *
  10. 20. a^b