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Skills Covered

  • Decompose 3-digit numbers into hundreds, tens, and ones
  • Write numbers in expanded form
  • Convert expanded form back to standard form
  • Understand place value of hundreds, tens, and ones
  • Recognize equivalent representations of numbers
  • Mixed practice with both directions

How to Use These Worksheets

This pack includes three worksheets covering expanded and standard form for 3-digit numbers. The first worksheet asks students to write numbers in expanded form, the second converts expanded form to standard form, and the third mixes both directions.

In the Classroom

Use these worksheets during place value units or as review practice. The progression from one direction to mixed practice helps students build confidence. Great for 2nd and 3rd grade math centers.

At Home

Help your child break apart numbers they see in everyday life - house numbers, prices, page numbers - into hundreds, tens, and ones. Then use these worksheets to practice writing the expanded form.

Tips for Success

  • Start with the expanded form worksheet before moving to standard form
  • Use base-ten blocks alongside for hands-on support
  • Remind students that the hundreds digit tells how many groups of one hundred
  • Save the mixed practice sheet for when both directions feel comfortable

Common Core Standards Alignment

These worksheets support the following Common Core State Standards for Mathematics:

  • 2.NBT.A.1a See ten tens grouped together as one unit called a hundred.
  • 2.NBT.A.1b Know that 100, 200 and so on up to 900 mean 1 to 9 hundreds with no tens or ones.
  • 2.NBT.A.3 Read and write numbers up to 1,000 as digits, in words, and in expanded form (like 300 + 40 + 7).

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

Expanded and Standard Form 3 Digit

2nd – 3rd Grade

Practice converting between expanded and standard form with 3-digit numbers. Includes a write-in-expanded-form worksheet, a write-in-standard-form worksheet, and a mixed practice worksheet.

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What’s Included

  • Write in Expanded Form worksheet
  • Write in Standard Form worksheet
  • Mixed Form Practice worksheet
  • 3-digit numbers (100–999)
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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.