# Composing and Decomposing Numbers in Kindergarten

Age-appropriate activities and ideas to use in kindergarten to teach, practice and master composing and decomposing numbers in groups of tens and ones.

► Looking for a starting place? Read Decomposing numbers: Why we teach this in kindergarten

## Free Valentines Decomposing Teen Numbers Mail-a-Number Activity

Work on decomposing numbers 11-19 by breaking numbers into groups of tens and ones. Here is a free Valentine-themed printable workmat and matching number cards that you can use with your kindergarten class. Let me show you how to use it, make it and give you some ideas on how to get the most from…

## Fun Christmas Composing Teen Numbers Game for Kindergarten

Give your students lots of opportunities to explore place value concepts like composing and decomposing numbers 11-19 in kindergarten. When you give them hands-on practice over and over they form solid foundations about numbers that lead to incredible results. It truly is amazing what they can do in kindergarten and how they can work through…

## Free Christmas Composing Teen Numbers Game for Kindergarten

Fill your lesson plans in December with fun, standards-based learning opportunities. Here is a free download to practice composing teen numbers (11-19) using groups of tens and ones. It’s my hope that you can integrate this free printable Christmas I Have, Who Has card game into your small group teaching in December. Teaching students to compose…

## Composing and Decomposing Numbers: a Guided Math Lesson Plan Flow

Here is an example of a guided math lesson that works on composing and decomposing numbers 11-19. I’m also going to lay out the flow of what the entire lesson looks like when I am meeting with my kinders in “the teacher zone”… which is what I call where I meet with students as a center…

## Ask the Teacher: Is 11 a Teen Number?

Here’s a great kindergarten math question that I posed to the awesome kindergarten teachers on facebook. “Is 11 a teen number?” Here is your answer straight from the source – what real kindergarten teachers have to say about 11 being a teen number. Plus, I’ll weigh in on the subject too with a pictured explanation. Teachers were…

## Frosted Frozen Compose Teen Numbers Game

Decompose and compose teen numbers like champs in your classroom with this fun, frozen, wintery game. This printable game board and pieces gives kindergartners the repeated hands-on practice they need to master composing numbers 11-19. It’s a composing/decomposing game that builds numbers up to 20 using groups of tens and ones. It’s fun and easy…

## Decomposing and Composing Numbers – Working With Accelerated Kindergartners

We discovered why decomposing and composing numbers really is crazy important and dug into our daily schedule to find out how to easily teach composing numbers regularly. This is part 3 of this series – it’s all about taking this standard to a new level! Let’s review real quick: Working on decomposing and composing numbers into their groups of…

## How to Teach Decomposing and Composing Numbers

What we just explored why decomposing and composing numbers really is crazy important in kindergarten. This is part 2 of this series – it’s all about making practicing this skill regularly a cinch in the kindergarten classroom. As a recap, I know that we often call this common core standard “place value,” but really it is…

## Decomposing Numbers – Why We Teach This in Kindergarten

Decomposing numbers means to break down numbers into their sub-parts. Common Core standards has kindergarten students decomposing numbers in two ways. The first is to decompose numbers into their tens and ones (focus on numbers 11-19) and the second is to show how any number 1-10 can be created using a variety of addends. I…

## Learning Teen Numbers in Kindergarten

Teaching teen numbers in kindergarten using a composing and decomposing numbers approach. Students learn the meaning behind place value and catch onto numbers 11-19 quickly. Here’s a math lesson I taught and the beauty behind letting kinders explore concepts over and over. Learning teen numbers in kindergarten without just “learning” by rote visualization! In math,…

## How to Create Ten Frame Manipulatives

Speaking of planning, I am sketching out the next nine weeks of math instruction. We are beginning work over the next nine weeks of really identifying, writing and composing/decomposing numbers 11-19 using tens and ones. As I was at the Dollar Tree today, I grabbed three sets of (affiliate) foam sheets. I was thinking of a way…

## Why does 10+6=16?

This year I have been using small group math instruction to guide my kinders. I’ve shared how its laid out and even a sample lesson called: Composing & Decomposing: A Guided Math Lesson Plan Flow I am very thankful for the insight that these opportunities provided since the way I was doing math in all…

## Calendar Time Binders – Teaching Standards Whole Group

Two years ago I decided to make a change to my calendar time. It was scary territory and I invited you along for the adventure. What prompted this change? It was about the same time that I started teaching the majority of my day in small groups. I decided to integrate calendar binders for four…