🧮 Addition Within 20 (B)

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Solve each problem. Show your working if you need to.

1.4 + 9 =

2.5 + 10 =

3.5 + 8 =

4.7 + 12 =

5.6 + 3 =

6.3 + 8 =

7.4 + 5 =

8.5 + 7 =

9.2 + 2 =

10.9 + 8 =

11.10 + 8 =

12.2 + 6 =

13.12 + 4 =

14.3 + 14 =

15.11 + 3 =

16.11 + 2 =

17.3 + 7 =

18.2 + 3 =

19.9 + 1 =

20.3 + 9 =

Answer key: 1. 13 · 2. 15 · 3. 13 · 4. 19 · 5. 9 · 6. 11 · 7. 9 · 8. 12 · 9. 4 · 10. 17 · 11. 18 · 12. 8 · 13. 16 · 14. 17 · 15. 14 · 16. 13 · 17. 10 · 18. 5 · 19. 10 · 20. 12

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Worksheets › Grade 1 › Numbers & maths

Grade 1 (ages 6–7)Numbers & mathsFree printable PDF

About this grade 1 worksheet

Free 1st grade addition worksheet: 20 addition facts within 20, with answer key. Practise counting on and making ten (set B). Skill: Adding within 20. Level: Grade 1 — also suits Year 2 (UK).

For teachers: skills & standards

CCSS 1.OA.C.6: Add and subtract within 20, with fluency within 10
Works as a morning-work page, a centre/station activity, homework or an early-finisher task.

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Is this worksheet free?

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What age is it for?

It is designed for Grade 1 (ages 6–7), but use it with any child who is ready.

What skills does it build?

Adding within 20.

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Pagine's free library has 20,000+ children's books you can read in the Pagine e-reader or the free Pagine app — sorted by age and grade, with free audiobooks too.

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