Home / Worksheets / 1st grade math1st grade math worksheets Addition and subtraction within 20 — the core fluency goal for first grade — with two versions of each sheet and answer keys.
Addition within 20 (1) Name ____________________ Score ____ / 30 linecraft.page · free printable math worksheets 1. 9 + 6 2. 16 + 3 3. 19 + 1 4. 12 + 8 5. 5 + 1 6. 10 + 3 7. 5 + 10 8. 18 + 1 9. 15 + 2 10. 1 + 15 11. 10 + 4 12. 13 + 4 13. 10 + 2 14. 17 + 1 15. 2 + 15 16. 5 + 9 17. 19 + 1 18. 19 + 1 19. 15 + 3 20. 17 + 3 21. 9 + 4 22. 10 + 1 23. 11 + 2 24. 13 + 2 25. 19 + 1 26. 17 + 2 27. 4 + 2 28. 9 + 1 29. 7 + 13 30. 4 + 8
Addition within 20 Subtraction within 20 (1) Name ____________________ Score ____ / 30 linecraft.page · free printable math worksheets 1. 10 - 5 2. 17 - 10 3. 20 - 14 4. 13 - 11 5. 6 - 1 6. 11 - 3 7. 6 - 4 8. 19 - 4 9. 16 - 5 10. 2 - 1 11. 11 - 4 12. 14 - 7 13. 11 - 2 14. 18 - 4 15. 3 - 2 16. 6 - 3 17. 20 - 15 18. 20 - 15 19. 16 - 8 20. 18 - 13 21. 10 - 3 22. 11 - 1 23. 12 - 3 24. 14 - 3 25. 20 - 2 26. 18 - 8 27. 5 - 1 28. 10 - 1 29. 8 - 7 30. 5 - 2
Subtraction within 20 Building fluency within 20 Aim for accuracy first, then speed. Strategies that help: counting on from the bigger number, making ten (8 + 5 = 8 + 2 + 3), and using doubles (6 + 7 = 6 + 6 + 1).
More free printables: cursive alphabet , word searches and math charts .
Frequently asked questions How many problems are on each sheet? 30 problems per page, with a second version and an answer key for each.
Updated 2026-10-07
