Write a fact family for 3, 5, and 8.
- The parts 3 and 5 make 8: 3 + 5 = 8 and 5 + 3 = 8.
- Subtract each part from the total: 8 − 3 = 5 and 8 − 5 = 3.
Answer: 3 + 5 = 8; 5 + 3 = 8; 8 − 3 = 5; 8 − 5 = 3
1st grade math · Printable practice
Addition and Subtraction Fact Family Worksheets
Write four related addition and subtraction facts for each number family within 20. Free printable worksheets, fresh families, and complete answer keys.
Learn the skill
Using addition and subtraction fact families
A fact family connects a total with two parts. Addition puts the parts together, while subtraction starts with the total and finds a missing part. The same three numbers can describe these relationships.
A method you can use
- Identify the largest number as the total in a whole-number part–whole family.
- Write an addition sentence in each order.
- Start each subtraction sentence with the total and subtract one part.
Worked examples
Use 6 + 4 = 10 to find 10 − 6.
- Ten is the total; six is one part.
- The other part is four.
Answer: 4
How many distinct facts come from 4, 4, and 8?
- Swapping the equal parts leaves 4 + 4 = 8 unchanged.
- Both subtraction arrangements give 8 − 4 = 4.
Answer: 2 distinct facts
Try it yourself
Solve these before opening the answers. The printable sets below give you more practice.
1. Use 7 + 2 = 9 to find 9 − 7.
Show answer and explanation
2
Removing the part 7 leaves the other part, 2.
2. Complete __ + 6 = 10.
Show answer and explanation
4
Use 10 − 6 = 4 to find the missing part.
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Addition and Subtraction Fact Family Worksheets
Use the three numbers to write two addition and two subtraction equations.
Name: ____________________ Date: __________
- 1.
Family: 4, 9, 13 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 2.
Family: 8, 12, 20 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 3.
Family: 3, 9, 12 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 4.
Family: 5, 9, 14 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 5.
Family: 5, 14, 19 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 6.
Family: 2, 9, 11 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 7.
Family: 9, 10, 19 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 8.
Family: 1, 10, 11 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 9.
Family: 2, 14, 16 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 10.
Family: 1, 8, 9 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 11.
Family: 2, 4, 6 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
- 12.
Family: 6, 9, 15 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___
Print at actual size or 100%. Answer keys start on a new page. Changing the set changes the order and selection; familiar facts may appear again.
Try one together
A worked example
Family: 3, 5, 8
Answer: 3 + 5 = 8; 5 + 3 = 8; 8 - 3 = 5; 8 - 5 = 3
The largest number is the whole. Both addition facts join the parts; both subtraction facts start with the whole.
How to use these worksheets
Every family uses two different positive parts and a whole no larger than 20. Avoiding equal parts gives four distinct equations on each item. The worksheet leaves four lines to write them.
Watch for this
Both subtraction equations must start with the whole. A family containing 3, 5, and 8 does not include 3 - 5 = 8.
Choose the next skill
Use easier facts for a warm-up, or connect this skill to another kind of question.
Printing and practice questions
Are the worksheets and answer keys free?
Yes. Generate and download these individual worksheets without an account. You can use them at home, in your classroom, or with your tutoring students.
Can I make a different worksheet next time?
Choose New questions for another set. Save settings remembers the question count, paper size, and answer-key choice on this device. It does not store learner names or progress.
Will this print on my paper size?
Select A4 or US Letter before downloading. Print the PDF at actual size. You can omit the answer key, or print only the question pages for learners.
What should I do if the questions are too difficult?
Start with six questions and work through the example together. Use the linked prerequisite skills or physical counters before trying another set. These are practice materials, not a diagnostic assessment.
Browse the original numbered worksheet sets
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