Grade 1 Addition Within 20 Worksheet

Free printable addition within 20 worksheet for grade 1 — 20 problems with an answer key. Print or save as PDF.

Math · Grade 1

Addition Within 20

Name Date Score

1. 19 + 1 =

2. 15 + 1 =

3. 8 + 12 =

4. 9 + 7 =

5. 13 + 1 =

6. 7 + 0 =

7. 2 + 14 =

8. 5 + 3 =

9. 17 + 3 =

10. 11 + 5 =

11. 1 + 2 =

12. 6 + 7 =

13. 9 + 0 =

14. 1 + 5 =

15. 12 + 4 =

16. 4 + 7 =

17. 8 + 5 =

18. 6 + 12 =

19. 19 + 0 =

20. 8 + 11 =

About This Worksheet

This free printable worksheet gives grade 1 learners 20 addition problems to practice, with a built-in answer key. Ideal for homework, morning work, or a quick review. Press "New Problems" for a fresh set anytime.

How to use it: click Print / Save as PDF to print or keep a digital copy. Click Show Answers to check the work (answers never print). Looking for a fun break? Try our free online games.