Eureka Math
1st Grade
Module 2
Lesson 10
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!
Directions for customizing presentations are available on the next slide.
Customize this Slideshow
Reflecting your Teaching Style and Learning Needs of Your Students
Screen A
“pop-out”
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
I can solve problems with addends of 7, 8, and 9.
1, 2, and 3 Less
Let’s play 1, 2, and 3 Less!
Example: On my signal, say the number that is 1 less.
T: 3.
S: 2.
We’ll practice with all numbers within 10. Then we’ll do 2 less and 3 less!
Decompose Addition Sentences into Three Parts
9 + 3
What does 9 need to make ten?
Decompose Addition Sentences into Three Parts
9 + 3
If we take 1, what part is left?
9 + 1
Decompose Addition Sentences into Three Parts
9 + 3
Let’s say the whole number sentence with 3 addends!
9 + 1 + 2
Decompose Addition Sentences into Three Parts
8 + 3
What does 8 need to make ten?
Decompose Addition Sentences into Three Parts
8 + 3
If we take 2, what part is left?
8 + 2
Decompose Addition Sentences into Three Parts
8 + 3
Let’s say the whole number sentence with 3 addends!
8 + 2 + 1
Decompose Addition Sentences into Three Parts
9 + 4
What does 9 need to make ten?
Decompose Addition Sentences into Three Parts
9 + 4
If we take 1, what part is left?
9 + 1
Decompose Addition Sentences into Three Parts
9 + 4
Let’s say the whole number sentence with 3 addends!
9 + 1 + 3
Decompose Addition Sentences into Three Parts
9 + 5
What does 9 need to make ten?
Decompose Addition Sentences into Three Parts
9 + 5
If we take 1 from 5, what part is left?
9 + 1
Decompose Addition Sentences into Three Parts
9 + 5
4 is left! Let’s say the whole number sentence with 3 addends!
9 + 1 + 4
Decompose Addition Sentences into Three Parts
8 + 5
What does 8 need to make ten?
Decompose Addition Sentences into Three Parts
8 + 5
If we take 2 from 5, what part is left?
8 + 2
Decompose Addition Sentences into Three Parts
8 + 5
Let’s say the whole number sentence with 3 addends!
8 + 2 + 3
Decompose Addition Sentences into Three Parts
8 + 4
What does 8 need to make ten?
Decompose Addition Sentences into Three Parts
8 + 4
If we take 2 from 4, what part is left?
8 + 2
Decompose Addition Sentences into Three Parts
8 + 4
Let’s say the whole number sentence with 3 addends!
8 + 2 + 2
Decompose Addition Sentences into Three Parts
9 + 6
What does 9 need to make ten?
Decompose Addition Sentences into Three Parts
9 + 6
If we take 1 from 6, what part is left?
9 + 1
Decompose Addition Sentences into Three Parts
9 + 6
Let’s say the whole number sentence with 3 addends!
9 + 1 + 5
Happy Counting
by Threes
Let’s play Happy Counting! We’re going to count by threes.
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.
When a finger has been counted, drop it and leave it down.
Application Problem
There were 4 boots by the classroom door, 8 boots in the hallway, and 6 boots by the teacher’s desk. How many boots were there altogether?
Concept Development
9 + 6 = _____
Using an organized math drawing or a number bond, solve 9 + 6. Think about the equal ten-plus fact, and write a true number sentence using two expressions.
Concept Development
9 + 6 = _____
When there is a 9 as an addend, what could you do to the other addend?
Concept Development
9 + 6 = _____
Get the 1 out! Break apart 6 into 1 and 5 as parts.
Concept Development
8 + 4 = _____
Let’s try another expression. Using an organized math drawing or a number bond, solve 8 + 4. Think about the equal ten-plus fact, and write a true number sentence using two expressions.
Concept Development
8 + 4 = _____
When there is a 8 as an addend, what could you do to the other addend?
Concept Development
8 + 4 = _____
Get the 2 out! Break apart 4 into 2 and 2 as parts.
Concept Development
7 + 6 = _____
Turn and talk to your partner. How might you solve this problem using what you already know about the make ten strategy?
Concept Development
7 + 6 = _____
Which number should we make ten with? Why?
Concept Development
7 + 6 = _____
With your partner, use a number bond to solve this problem.
Concept Development
7 + 6 = _____
7 + 6 the same as 10 + 3!
Concept Development
7 + 6 = _____
Write that as a true number sentence!
Concept Development
10 + 3 = 7 + 6
Concept Development
10 + 3 = 7 + 6
What is 10 + 3?
Concept Development
10 + 3 = 7 + 6
10 + 3 is 13! So, what is 7 + 6? Say the number sentence.
Concept Development
10 + 3 = 7 + 6
7 + 6 =13!
Concept Development
Let’s practice more!
4 + 7 = ____
Using an organized math drawing or a number bond, solve 4 + 7. Think about the equal ten-plus fact, and write a true number sentence using two expressions.
Concept Development
Let’s practice more!
7 + 5 = _____
Using an organized math drawing or a number bond, solve 4 + 7. Think about the equal ten-plus fact, and write a true number sentence using two expressions.
Concept Development
Get the 3 out! Make 3 as a part.
Concept Development
Now, we are going to play Simple Strategies! Here’s how you play:
I will assign partners. You will make combine your cards and make 2 piles:
Concept Development
1. Partner A picks a card from the first pile (digits 1–6).
2. Using the 9 card from the second pile and the card picked by Partner A, Partner B writes an addition expression (e.g., 6 + 9).
3. Partners use counting on and then use making ten to solve the expression.
4. After using the make ten strategy, Partner A writes down the equal 10 + fact.
5. Partners place the equal sign card between the boards to make a true number sentence.
6. Switch roles. Keep the 9 card up each time you begin a new expression.
Problem Set
Debrief
Debrief
Debrief
Debrief
Exit Ticket