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Home » Kindergarten Math

Composing and Decomposing Numbers: What This Looks Like in Kindergarten [3-Part Series]

By Leslie Simpson · About 2 minutes to read this article.

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Building kinders with great number sense has really helped us grow in all areas of math this year.

Recently, I wrote a three-part series to illustrate some of how we've worked on it especially in relation to composing and decomposing numbers using groups of tens and ones.

Decomposing Numbers

In part one, I explain the value and long-term picture of breaking and creating numbers using such a format.

Decomposing and composing numbers in kindergarten and the real reason we teach this standard

I also share with you how repeated practice makes a big difference based on the fact that it helps numerals become visual rather than just a written number.

Read: Decomposing Numbers – Why We Teach This in Kindergarten

How to Teach Decomposing Numbers

In part two, I share my tips and ideas for implementing enough practice through your day and weekly schedule with the hopes that you might be able to use one {or some} of them.

How to Teach Decomposing and Composing Numbers in Kindergarten

This includes practice during calendar, games, small group activities, math journaling, and other practice opportunities.

I tried to include tons of pictures so you could really see the range of work we do even though most of them are from the spring and show more difficult levels of this skill.

Read: How to Teach Decomposing and Composing Numbers

How to Teach Decomposing Numbers with Equations (and to Accelerated Kinders)

In part three, I was nervous to share with you some of how I work with my accelerated kindergartners.

I am not a gifted/talented teacher nor do I want to pretend to be.

Teaching decomposing numbers to accelerated kindergartners

I want to give my students work that fits them well, not just "more" work since they can do our Common Core standards independently.

So I share with you how I check in on my kinders' understanding, give practice to work through any leftover misconceptions and give them larger numbers to manipulate for independent practice.

Read: Decomposing and Composing – Working With Accelerated Kindergartners

Isn't it amazing how far we come in one year!

These are the three pieces of the puzzle to better teach composing and decomposing numbers in kindergarten.

I hope this collection of tips, ideas and things I've learned from teaching kinders this skill can be beneficial to you and your class.

If you like what I do here on KindergartenWorks, then be sure to subscribe today. I look forward to sharing ideas with you weekly.

More Decomposing Numbers

  • How to Teach Counting by Tens, Then Adding Ones
  • A Sample Decomposing LessonWhy Does 10+6=16?
  • Learning Decomposing with Words
  • Creating Decomposing/Composing Manipulatives
Composing and Decomposing Numbers in Kindergarten - I love all of these ideas in this series
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About Leslie Simpson

Leslie is the teacher behind KindergartenWorks. She believes in teaching kinders how to be pretty incredible along with teaching them to read, write and think for themselves. She enjoys drinking hot tea, making mud pies with her three kids and sharing what she's learned with teachers.

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