Loading preview...

Skills Covered

  • Write all four facts in a fact family
  • Connect addition and subtraction as inverse operations
  • Build fluency with sums within 10
  • Recognize patterns in related facts
  • Develop mental math strategies
  • Strengthen number sense to 10

How to Use This Worksheet

Students examine each fact family triangle showing three related numbers with sums up to 10, then write all four equations. This reinforces the relationship between addition and subtraction.

In the Classroom

Perfect for 1st grade math centers focused on fact families. Students who have mastered sums within 5 are ready to extend to 10. Pair with manipulatives like ten frames for visual support.

At Home

Have your child use ten frames or counters to model each fact family before writing the equations. This concrete-to-abstract approach builds deeper understanding.

Tips for Success

  • Encourage students to check each equation by counting on fingers or using counters
  • Point out the commutative property in the two addition facts
  • Have students circle the largest number in each triangle
  • Use the answer key for self-checking

Common Core Standards Alignment

This worksheet supports the following Common Core State Standards for Mathematics:

  • K.OA.A.2 Solve story problems and add or subtract with totals up to 10, modeling them with objects or drawings.
  • 1.OA.B.4 Treat subtraction as finding a missing addend: to solve 12 - 9, ask what added to 9 makes 12.

© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

Fact Families Within 10 - Write All

K – 1st Grade

Write all four related addition and subtraction facts for each fact family with sums within 10. Strengthens understanding of how addition and subtraction are connected.

Download PDF
Pin
Want to customize? Open in our worksheet maker →

What’s Included

  • 5 fact family worksheets
  • Sums within 10
  • Write-all-4-facts format
  • Triangle diagram layout
  • Answer keys included
Can’t find what you need?

Tell us what to make next, or build your own with a worksheet maker.

Suggest a worksheet

Free to print and share

This worksheet is free to download, print, copy, and hand out in your classroom or at home. You do not need to create an account, and there are no watermarks on the PDF.