Parts in Teen Number

Eureka Math/EngageNY Kindergarten, module 5, lesson 21 Common Core Worksheets

New York State Common Core Math Kindergarten, module 5, lesson 21
Worksheets for Kindergarten

Worksheets, solutions, and videos to help Kindergarten students learn how to represent teen number decompositions as 10 ones and some ones, and find a hidden part.

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

Lesson 21 Concept Development and Problem Set

Peter saw 8 puppies at the pet store in a cozy cage. While he was watching them, 2 hid in a little box. How many puppies could Peter see then? Draw a picture and write a number bond and number sentence to match the story.

Model each number with cubes on your number bond mat. Then complete the number sentences and number bonds.
11 = 10 + _____
10 + _____ = 11

12 = 10 + _____
10 + _____ = 12

13 = 10 + _____
10 + _____ = 13

_____ + 5 = 15
15 = _____ + 5

_____ + 7 = 17
17 = _____ + 7

_____ + 8 = 18
18 = 10 + _____

What can you explain about the numbers 11, 12, 13, 14, 15, 16, 17, 18, 19? What do they have in common? How are they different?

Lesson 21 Homework

Complete the number bonds and number sentences. Draw the cubes of the missing part.
15 = _____ + 10
_____ + 8 = 18
6 + 10 = ____
1 + ____ = 11

Learning Goal

I can describe the parts in a teen number.

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