Across
- 1. per-million
- 3. root 3√a - 3√a - 3√a = a
- 5. both plus and minus operations
- 7. +
- 9. a^b
- 11. √a - √a = a
- 15. per-trillion
- 16. ‰
- 19. ×
- 20. greater than or equal to
Down
- 2. ‰
- 4. =
- 6. root √a - √a = a
- 8. not equal sign
- 10. *
- 11. -
- 12. ≠
- 13. [ ]
- 14. per-billion
- 17. decimal point
- 18. remainder calculation