Eureka Math

1st Grade

Module 2

Lesson 6

At the request of elementary teachers, a team of Bethel & Sumner educators met as a committee to create Eureka slideshow presentations. These presentations are not meant as a script, nor are they required to be used. Please customize as needed. Thank you to the many educators who contributed to this project!

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Directions for customizing presentations are available on the next slide.

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Customize this Slideshow

Reflecting your Teaching Style and Learning Needs of Your Students

• When the Google Slides presentation is opened, it will look like Screen A.
• Click on the “pop-out” button in the upper right hand corner to change the view.
• The view now looks like Screen B.
• Within Google Slides (not Chrome), choose FILE.
• Choose MAKE A COPY and rename your presentation.
• Google Slides will open your renamed presentation.
• It is now editable & housed in MY DRIVE.

Screen B

Icons

Read, Draw, Write

Learning Target

Think Pair Share

Individual

Partner

Whole Class

Small Group Time

Small Group

Personal White Board

Problem Set

Manipulatives Needed

Fluency

Materials Needed

• (T) Rekenrek, if available
• (S) Personal white board

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I can manipulate addends to make 10.

Happy Counting

by Twos

Let’s play Happy Counting! We’re going to count by ones.

When I hold my hand like this (point thumb and motion up), I want you to count up.

If I put my hand like this (point thumb and motion down), I want you to count down.

If I do this (thumb to the side) that means stop, but try hard to remember the last number you said.

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When a finger has been counted, drop it and leave it down.

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Take Out 2:

Number Bonds

I’m going to show you a number. You are going to write a number bond for it with 2 being one of the addends. When I say “show me”, I want to you hold up your white board.

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For example, if I show you 10 you are going to write…

10

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Take Out 2:

Number Bonds

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Get Ready!

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8

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6 2

Take Out 2:

Number Bonds

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Get Ready!

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9

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7 2

Take Out 2:

Number Bonds

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Get Ready!

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7

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2 5

Take Out 2:

Number Bonds

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Get Ready!

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5

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2 3

Decompose Addition Sentences into Three Parts

Say 3 as an addition sentence starting with 1.

9 + 3

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Decompose Addition Sentences into Three Parts

9 + 3

1 + 2

Now say 9 + 3 as a three-part addition sentence.

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Decompose Addition Sentences into Three Parts

9 +1 + 2 = 12

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Decompose Addition Sentences into Three Parts

Say 5 as an addition sentence starting with 1.

9 + 5

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Decompose Addition Sentences into Three Parts

9 + 5

1 + 4

Now say 9 + 5 as a three-part addition sentence.

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Decompose Addition Sentences into Three Parts

9 +1 + 4 = 14

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Decompose Addition Sentences into Three Parts

Say 4 as an addition sentence starting with 1.

9 + 4

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Decompose Addition Sentences into Three Parts

9 + 4

1 + 3

Now say 9 + 4 as a three-part addition sentence.

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Decompose Addition Sentences into Three Parts

9 +1 + 3 = 13

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Application Problem

There are 6 children on the swings and 9 children playing tag. How many children are playing on the playground? Make ten to solve. Create a drawing, a number bond, and a number sentence along with your statement.

Concept Development

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5 + 9 =

Turn and talk to your partner. What strategy should we use to solve efficiently?

Concept Development

Should we make ten with 5 or with 9? Let’s have each partner try it a different way.

Partner A, solve this by making ten with 5. Partner B, solve this by making ten with 9.

Concept Development

Share your solution with your partner.

Did you get the same total or a different total? Discuss how you solved it.

Concept Development

How much is 5 + 9?

14

Concept Development

Did you solve for the total using the same way?

How did you and your partner solve this?

Concept Development

(Write students’ solutions on the board, including bonds.)

So, Partner A added 5 + 9 using 5 + 5 + 4. You’re saying that this is the same as Partner B’s work where she added 5 + 9 using 9 + 1 + 4. (Point to the number bond.) So, 5 + 5 + 4 is the same as 9 + 1 + 4? (Point to the number bonds.)

Concept Development

Which way did you prefer? Why?

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Do we always have to start with the first addend when we are adding?

Concept Development

Now let’s solve

3 + 9

Which number should we start with?

Concept Development

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On your personal white board, find the total, and show your bonds

Concept Development

What is the related 10+ fact to help you solve 3 + 9?

10 + 2

Concept Development

So, what is 3 + 9?

Say the number sentence.

3 + 9 = 12

Concept Development

9 + 4 =

Which number should we make ten with?

That’s right! 9

Concept Development

9 + 4 =

Which number should we break apart?

That’s right!

We should break apart 4.

Concept Development

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On your personal white board, find the total, and show your bonds

Concept Development

Now solve 9 + 6 on your whiteboard.

1. Make 10
2. Write the 10 + fact as a number bond and a number sentence

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Concept Development

Now solve 8 + 9 on your whiteboard.

• Make 10
• Write the 10 + fact as a number bond and a number sentence

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Concept Development

Now solve 7 + 9 on your whiteboard.

• Make 10
• Write the 10 + fact as a number bond and a number sentence

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Problem Set

Debrief

• Look at Problem 8. Find as many related equal equations as you can.

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• Look at Problem 8. In which problem can you use your doubles + 1 fact to help you solve?

Debrief

• How did we apply the make ten strategy today to solve addition problems efficiently?

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• To solve 3 + 9, which addend should we make ten with? Why?

Debrief

• Look at your Application Problem. Turn and talk to your partner about which addend we should break apart to solve the problem more efficiently.

Exit Ticket