# Break Apart Teen Numbers

Eureka Math/EngageNY Kindergarten, module 5, lesson 20 Common Core Worksheets

New York State Common Core Math Kindergarten, module 5, lesson 20
Worksheets for Kindergarten

Worksheets, solutions, and videos to help Kindergarten students learn how to represent teen number compositions and decompositions as addition sentences.

Topic E: Represent and Apply Compositions and Decompositions of Teen Numbers

Lesson 20 Concept Development and Problem Set

Each student got 6 colored pencils and 4 regular pencils. How many pencils did each student get? Draw a picture, a number bond, and write a number sentence, too.

Fill in the number bonds and write a number sentence to match it.
13 = ____ + ____
15 = _____ + _____
17 = _____ + _____
10 + 8 = _____
10 + 6 = _____
_____ = 10 + 4

1. In a number bond, which number is larger, the whole or a part?
2. Explain how the teen numbers are 10 ones and some more ones.
3. Look at each number bond as I say the whole. You read the number the Say Ten way, e.g., I say 13 and you say ten three.
4. Mental math: I say 16, you say 10 + 6.
5. Show a row of ten on the Rekenrek, and then slide beads to show the teen numbers. Students say the numbers the regular and the Say Ten way.
6. What are we doing with the parts when we add? Are we putting them together or taking them apart?

Lesson 20 Homework

Draw stars to show the number as a number bond of 10. Show each example as two addition sentences of 10 ones and some ones.

Learning Goal

I can break apart teen numbers in different ways.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.