Composing and Decomposing Teen Numbers
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: K
Lesson Length: 45 minutes
Keywords/Tags: Compose, Decompose, Teen Numbers
Lesson Description: In this lesson, the students will explore composing and decomposing teen numbers. The students will discover the relationships between tens and ones and will begin to grasp how to compose and decompose numbers 11-19 using ten frames, movement, and other strategies. The students will also be exposed to number bonds to help them compose and decompose teen numbers. This will provide the students with foundational math concepts.

  • Other K.NR.3: Use place value understanding to compose and decompose numbers from 11–19.
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Video : Composing Numbers and Decomposing Numbers
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: Learn how to compose and decompose numbers with the Scratch Garden! This video allows the students to grasp the concepts of composing and decomposing. Scratch Garden uses numbers 0-10 to explain the concepts. The students will then be able to use this information to help them grasp composing and decomposing numbers 11-19.
Video : Number Bonds 11-19. Math Song For Kids. Jack Hartmann
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: Learn how to compose and decompose teen numbers with Jack Hartmann!
Quiz : Composing and Decomposing Teen Numbers
Instructions: Please complete this quiz by choosing/typing the correct answer for each question. You can take this quiz as many times as needed.
Question #1

 

What 2 numbers compose the number 15?

Question #2
18 is composed of the numbers 10 and 8.
Question #3
Decompose the number 12.
Question #4

The number 19 is decomposed into numbers 10 and _______.

Question #5

What do the numbers 10 and 4 compose?

Question #6
The number 17 is decomposed into numbers 10 and 2.
Question #7

The number 11 is composed of what 2 numbers?

Question #8
Decompose the number 18 into 2 numbers
Question #9
The number 18 is composed of 10 and 8.
Question #10

The number 16 is decomposed into numbers 10 and ________?

Description: This quiz will incorporate number bonds to showcase if the students are grasping the concept of composing and decomposing teen numbers.
Resources : Practice Composing and Decomposing Teen Numbers
Instructions: Please see additional external resources below. Feel free visit each link to learn more about this lesson.
Starfall: Compose & Decompose Numbers
Please visit the Starfall link below to practice composing and decomposing teen numbers. The students will be given an "order". They will have to correctly prepare the order by composing/decomposing the teen numbers.
Numbers in the Teens
Let's review how many tens and ones are in our teen numbers!
Number Bond Practice
Use the blank number bonds to practice creating your own number bonds. The number bonds can be used to compose and decompose teen numbers.
Description: The resources should be used to explore and practice composing and decomposing teen numbers. The students are able to play games and listen to songs to help them grasp the concepts.