Across
- 5. L
- 6. six
- 8. semi or hemi
- 9. first
- 11. 10
- 13. decimal
- 14. first
- 16. alone
- 18. one and a half
- 20. fifth
- 22. both
- 24. C or centi or cent
- 25. third
- 26. X decem or deca
- 27. second
- 28. nothing
- 30. three
Down
- 1. seventh
- 2. fourth
- 3. 9
- 4. D
- 7. M milli or mill
- 10. 8
- 12. 4
- 15. twice
- 17. eigth
- 19. I or uni
- 21. 7
- 23. twice
- 28. no, none
- 29. V or quinqu
