Addition & Subtraction Fact Families
Free printable addition and subtraction fact family worksheets with an answer key. Use the three numbers in each triangle to write all four related facts. Play online or download the PDF — great for Grades 1–2.
Use the three numbers to complete the four facts — you'll see a ✓ when each is right.
Explore the Elementary Math & Number Sense Sequence
A structured progression following the Concrete-Pictorial-Abstract (CPA) framework — from part-whole number bonds to inverse operations, multi-digit arithmetic, and algebraic functions.
Fact Families
4-fact inverse relationship triangles
Learn How to Play, Solve & Teach Addition & Subtraction Fact Families
Elementary Math Mastery: A Guide to Number Bonds, Fact Families & Number Pyramids
A complete parent and teacher guide to mastering early mental math. Learn how number bonds, fact families, and number pyramids build deep conceptual numeracy from kindergarten through 4th grade.
What Are Fact Families in Math? A Guide for Parents & Teachers
Fact families turn three numbers into four related facts, showing kids how addition and subtraction (or multiplication and division) undo each other. Learn what they are, why they help, and make free printable fact family worksheets.
Frequently asked questions
What is a fact family?+
A fact family is a group of related math facts built from three numbers. For 3, 4 and 7 the addition/subtraction family is 3 + 4 = 7, 4 + 3 = 7, 7 − 3 = 4, and 7 − 4 = 3. Multiplication/division families work the same way with × and ÷.
Why do fact families help?+
They make the inverse relationship between operations explicit — addition undoes subtraction, and multiplication undoes division. Seeing all four facts from one triangle helps children learn facts in groups and use one known fact to find three others.
How is a fact family different from a number bond?+
A number bond is the part-part-whole diagram; a fact family is the four equations that come from it. Number bonds usually come first, then fact families turn the same numbers into written facts.
What ages are fact families for?+
Addition and subtraction fact families suit Grades 1–2 (ages 6–8); multiplication and division families fit Grades 3–4 as times tables are learned.
Are the fact family worksheets free?+
Yes. Generate unlimited worksheets and play online or download printable PDFs with an answer key for free — no signup.