Eureka Math
First Grade
Module 1
Lesson 33
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 show 0 less and 1 less as a picture and as a subtraction number sentence.
Rekenrek Counting Within 20
T: Pull out your rekenrek.
T: See notes
Sprint
Let’s do a Sprint!
0 Less, 1 Less
When I give you the signal, I want you to answer the problem.
Get Ready!
0 Less, 1 Less
1 less than 8 is?
0 Less, 1 Less
What comes before 6?
0 Less, 1 Less
6 minus 0 equals?
0 Less, 1 Less
0 less than 9 is?
0 Less, 1 Less
9 is 1 less than...?
0 Less, 1 Less
9 equals 10 minus...?
Application Problem
Nine children are playing outside. One child is on the swings and the rest are playing tag. How many children are playing tag?
Write a number bond and number sentence. Make a math drawing to show how you know.
Concept Development
How many beads are on your number bracelet?
Take 1 bead away.
How many beads do we have now?
Write a number sentence to show what we did.
Concept Development
10 - 1 = 9
Now, push that bead all the way up until it is hiding in your hand.
We have 9 beads.
Concept Development
Show 9 beads. Take one bead away.
We have _____ beads.
Write a number sentence for what we just did.
Concept Development
Show 8 beads. Take one bead away.
We have _____ beads.
Write a number sentence for what we just did.
Concept Development
Show 7 beads. Take one bead away.
We have _____ beads.
Write a number sentence for what we just did.
Concept Development
Push your beads back, and open your pipe cleaner so that your beads are in a straight line.
Push a set of 3 white beads away to the end of the pipe cleaner.
Concept Development
Tell me a number sentence to describe what we did.
Concept Development
Use your beads to show me 7-1.
Write the number sentence on your board.
Concept Development
Use your beads to show me 5-1.
Write the number sentence on your board.
Concept Development
We have 4 beads. This time, take 0 away.
How many beads do we have now?
Concept Development
Hmmm. Let’s try that with a larger number.
Push all your beads back to the middle so we can start with 10.
Take away 0 beads. How many beads do we have now?
Write a number sentence to show what we did.
Concept Development
Now start with 9 beads.
Take away 0 beads. How many beads do we have now?
Write a number sentence to show what we did.
Concept Development
Now start with 6 beads.
Take away 0 beads. How many beads do we have now?
Write a number sentence to show what we did.
Problem Set
Problem Set
Debrief
How can solving Problem 1 help you solve Problem 3?
Debrief
Explain to your partner any patterns you see in Problems 3 –10.
Debrief
Talk to your partner about how visualizing your 5-groups can help you solve Problem 17(g). � Explain how solving 10 – 0 can help you solve 122 – 0. What happens every time you subtract 0?
Debrief
Explain how solving 9 – 1 can help you solve 73 – 1. What happens every time you subtract 1? How does subtracting 1 relate to counting?
Debrief
How did the Application Problem connect to today’s lesson?
Exit Ticket