Add and subtract within 20: math worksheet for Grades 1–2, page 1 preview

Math worksheet · Mathematics

Add and subtract within 20 · Grades 1–2

Mixed practice adding and subtracting with numbers up to 20.

Grades 1–2 · ages 6 to 8
Medium
25 to 35 minutes
1 page
Free

Goes with the game Number-Line Hop.

The answer key is a separate page for grown-ups. Sign in to download it.

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The 24 problems on the sheet

Directions: Solve each problem. Show your thinking on scrap paper if you like.

1. 17 − 14 =
2. 13 − 12 =
3. 16 − 3 =
4. 16 − 6 =
5. 17 − 15 =
6. 19 − 12 =
7. 10 − 8 =
8. 5 − 2 =
9. 12 − 8 =
10. 16 − 10 =
11. 19 − 3 =
12. 16 − 13 =
13. 19 − 15 =
14. 17 − 16 =
15. 9 − 8 =
16. 11 − 11 =
17. 4 − 3 =
18. 20 − 13 =
19. 7 − 6 =
20. 10 − 9 =
21. 16 − 2 =
22. 11 − 10 =
23. 9 − 9 =
24. 14 − 4 =

What your child practices

Your child practices the math skill “Add and subtract within 20”: add and subtract within 20 by counting on and back.

Grades and ages: Grades 1–2, ages 6 to 8
Time: About 25 to 35 minutes
Subject: Mathematics
Level: Medium for Grades 1–2
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Try the first question together so the format is clear. Then let your child work through the rest, showing their thinking on the page. It is pitched at the expected level for Grades 1–2, for practice after the skill has been taught.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Check the first three problems together before your child carries on alone; most mix-ups show early.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.