🧮 Subtraction Within 20

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

1.16 − 3 =

2.20 − 7 =

3.16 − 15 =

4.14 − 10 =

5.19 − 1 =

6.14 − 11 =

7.17 − 9 =

8.20 − 10 =

9.12 − 5 =

10.12 − 11 =

11.12 − 12 =

12.20 − 7 =

13.20 − 4 =

14.13 − 1 =

15.11 − 11 =

16.19 − 8 =

17.15 − 1 =

18.12 − 9 =

19.12 − 2 =

20.15 − 3 =

Answer key: 1. 13 · 2. 13 · 3. 1 · 4. 4 · 5. 18 · 6. 3 · 7. 8 · 8. 10 · 9. 7 · 10. 1 · 11. 0 · 12. 13 · 13. 16 · 14. 12 · 15. 0 · 16. 11 · 17. 14 · 18. 3 · 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 subtraction worksheet: 20 subtraction facts within 20 with answer key — count back or think addition. Skill: Subtracting 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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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?

Subtracting within 20.

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Number Tracing 0–10 · Number 1 Worksheet: Trace, Count & Colour · Number 2 Worksheet: Trace, Count & Colour · Number 3 Worksheet: Trace, Count & Colour · Number 4 Worksheet: Trace, Count & Colour · Number 5 Worksheet: Trace, Count & Colour · Number 6 Worksheet: Trace, Count & Colour · Number 7 Worksheet: Trace, Count & Colour · Number 8 Worksheet: Trace, Count & Colour · Number 9 Worksheet: Trace, Count & Colour

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