Decompose the Number 8

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Eureka Math/EngageNY Kindergarten, module 4, lesson 24 Common Core Worksheets

New York State Common Core Math Kindergarten, module 4, lesson 24
Worksheets for Kindergarten

Worksheets, solutions, and videos to help Kindergarten students learn how to decompose the number 8 using 5-group drawings and crossing off a part, and record each decomposition with a drawing and subtraction equation.

Topic D: Subtraction from Numbers to 8

Lesson 24 Concept Development and Problem Set

Robin had 8 cats in her house. Three of the cats went outside to play in the sunshine. Draw her cats. Use your picture to help you draw a number bond about the cats. How many cats were still in the house? Can you make a number sentence to tell how many cats were still inside?
Share your work with your partner. Did he do it the same way?

Fill in the number sentences and number bonds.
Put an X on 3 dots.
Put an X on 5 dots.
Put an X on some dots.
Draw 8 dots. Put an X on 1 dot.
Draw 8 dots in a 5-group. Put an X on 7 dots.
Draw 8 dots in a 5-group. Put an X on some dots.

In the Problem Set, did the 5-group dots make it easier to see how many dots were left? Why?
In the last problem, how many dots did you put an X on? What did your number sentence and number bond look like?
Look at the first problem. Tell me all the numbers in your number bond and number sentence.
a. Show me which dots the 8 is talking about.
b. Show me which dots the 3 is talking about.
c. Show me which dots the 5 is talking about.
What number is the same in all of the number bonds and all of the number sentences. Why is 8 in all of them?
How did the number bonds and the number sentences help one another in our lesson?

Lesson 24 Homework
Here is 8 the 5-group way. Put an X on 2 cubes. How many are left? Fill in the number sentence and number bond.
Here is 8 the 5-group way. Put an X on 4 cubes. How many are left? Fill in the number sentence and number bond.
Draw 8 the 5-group way. Put an X on some cubes. How many are left? Write the number sentence and the number bond.

Learning Goal
I can decompose 8, using objects and drawings.

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