Numbers 1 to 20 – Exercise Write the numbers as words into the gaps.1. 15 → 2. 3 → 3. 19 → 4. 12 → 5. 2 → 6. 14 → 7. 17 → 8. 1 → 9. 11 → 10. 8 → 11. 10 → 12. 13 → 13. 16 → 14. 5 → 15. 18 → Time's up