Across
- 4. ≥,≤
- 8. mod
- 9. a^b ,exponent
- 12. a², exponent
- 15. ppm
- 16. — division or fraction
- 17. *multiplication
- 18. ppb
- 19. [ ]
Down
- 1. - subtraction
- 2. √a
- 3. ³√a
- 5. ≠ inequality
- 6. ‰
- 7. %
- 10. = equality
- 11. ()
- 13. +addition
- 14. ×,multiplication
- 15. decimal point separator