2nd Grade Fact Families Worksheet (to 20)
Write the four facts in each fact family using three numbers within 20.
- Homework
- Centers
- Review
- Intervention
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- 2nd Grade
- Subject
- Math
- Skill
- Fact Families
- Topic
- addition and subtraction fact families to 20
- Difficulty
- Standard
- Time
- 12 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- homework, centers, review, intervention
Worksheet details
What This Worksheet Practices
Students will write the four related addition and subtraction facts for a set of three numbers within 20.
- Writing two addition facts
- Writing two subtraction facts
- Connecting addition and subtraction
Worksheet Preview
Three numbers, four facts — now to 20
A fact family links three numbers into two addition facts and two subtraction facts. The biggest number is the whole; the other two are the parts. Practicing families to 20 cements the idea that subtraction undoes addition — if 7 + 8 = 15, then 15 − 8 = 7 — which speeds up recall of the harder facts.
How to use it
Have students find the whole (biggest number) first, then build the two addition and two subtraction facts. Builds on 1st grade fact families and pairs with number bonds.
👩🏫 Teacher note
The largest number is always the whole (the sum). Fact families to 20 reinforce that subtraction undoes addition and speed up recall.
🏠 Parent note
The biggest number is the whole. The two smaller numbers add to it, and you can subtract either from it.
Common Mistakes to Watch For
- Writing subtraction facts in the wrong order
- Not treating the largest number as the whole
Answer Key
Each answer shows all four facts in the family.
⬇ Download Answer Key (PDF)Related Worksheets
Number Bonds Worksheet
Fill in the missing number in each number bond - sometimes a part, sometimes the whole.
100 More, 100 Less Worksheet
Find 100 more and 100 less than a number by adding or removing one hundred-flat.
2-Digit Addition with Regrouping Worksheet
Practice adding two-digit numbers that require carrying a ten — the heart of second-grade addition.
2-Digit Addition Without Regrouping Worksheet
Add two-digit numbers by adding the ones and the tens separately — no carrying needed yet.
Frequently Asked Questions
Is this worksheet free to download?
Yes. You can download and print this worksheet for free, with no sign-up required.
Does it come with an answer key?
Yes — a complete answer key is included.
Original & reviewed. Every worksheet is created in-house from a grade-level skill brief, checked for a correct answer key, and reviewed for grade-appropriateness. Our editorial policy.