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