carla and her birthday cookies by gloria talbert
Post on 13-Dec-2015
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Carla’s mother had baked her favorite dessert, cookies. For each year of her age she received two cookies.
Can you figure out how many cookies her mother gave her for her birthday?
If you said TWENTY you’re correct!
Let’s see how to figure this out.
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20
First, we know that Carla is turning ten, so we need to make ten circles.
Year 1
Year 6
Year 2 Year 3 Year 4 Year 5
Year 7 Year 8 Year 9 Year 10
Add two cookies to every circle since Carla is ten.
Add all of the cookies. Carla received twenty cookies for her birthday.
This is called repeated addition.
2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 20
This is also multiplication: 2 x 10 = 20.
Carla wants to share her cookies with her mother.
She puts her cookies into two groups, one for herself and one for her mother.
How many cookies will each of them get?
If you guessed that Carla and her mother will get TEN cookies each, you’re correct!
Let’s see how to figure this out.
CarlaMother
The problem is 20 ÷ 2. First, let’s see what the problem means: Carla has 20 cookies and puts them into two groups. How many will be in each group?
Next we will make two groups.Then begin adding one cookie to each group until you
have used all of the cookies.
Carla Mother
Carla Mother
There are ten cookies in each group so Carla and her mother will get ten cookies.
How do you think you’ll write the complete division problem?
20 ÷ 2 = 10
Three of Carla’s friends, Dawn, Jasmine, and Candice, come to her birthday party.
Carla splits her cookies into five groups, one for everyone present.
How many cookies will each of them get?
Carla Mother Dawn Jasmine Candice
Carla thinks that each girl should get FIVE cookies.
Dawn thinks that each girl should get FOUR cookies.
Jasmine thinks that each girl should get SIX cookies.
Who do you think is correct?
If you said each person would get FOUR cookies like Dawn said, you’re correct!
Carla Mother Dawn Jasmine Candice
Let’s see how to do this.
The problem is 20 ÷ 5. Let’s see what this means: Carla has 20 cookies and puts them into five groups. How many cookies will be in each group?
Next we will make five groups-one for each girl.Then begin adding one cookie to each group until you have used all of the cookies.
Carla Mother Dawn Jasmine Candice
There are four cookies in each group so each girl will get four cookies.
Carla Mother Dawn Jasmine Candice
How do you think you’ll write the complete division problem?
20 ÷ 5 = 4
Five more of Carla’s friends came over: Marsha, Tara, Ashley, Shannon, and Leslie.
Carla splits the cookies into ten groups, one for each girl present.
How many cookies will each girl get?
Marsha Tara Ashley Shannon Leslie
Carla Mother Dawn Jasmine Candice
Marsha thinks that each girl will get FIVE cookies.
Ashley thinks that each girl should get FOUR cookies.
Leslie thinks that each girl should get TWO cookies.
Who do you think is right?
If you said TWO cookies like Leslie, you’re correct!
Marsha Tara Ashley Shannon Leslie
Carla Mother Dawn Jasmine Candice
Let’s figure out how to do this.
The problem is 20 ÷ 10. Let’s see what this means: Carla has twenty cookies and puts them into ten groups. How many cookies will be in each group?
Next we will make 10 groups-one for each girl present.
Then begin adding one cookie to each group until you have used all of the cookies.
Carla Mother Dawn Jasmine Candice
Marsha Tara Ashley Shannon Leslie
There are two cookies in each group so each girl received two cookies.
Carla Mother Dawn Jasmine Candice
Marsha Tara Ashley Shannon Leslie
How do you think you’ll write the complete division problem?
20 ÷ 10 =2
Ten more of Carla’s friends have arrived: Laura, Jane, Kelcy, Tasha, Tanya, Janet, Linda, Vaughn, Nancy,and Mona.
Carla splits the cookies into twenty groups.
How many cookies will each person get?
Marsha Tara Ashley Shannon Leslie
Carla Mother Dawn Jasmine Candice Laura Jane Kelcy Tasha Tanya
Janet Linda Vaughn Nancy Mona
Carla’s mother says, “I think that everyone should get one cookie. Let’s see.”
Do you think that Carla’s mother is correct?
If you said ONE like Carla’s mother, then you’re correct!
Marsha Tara Ashley Shannon Leslie
Carla Mother Dawn Jasmine Candice Laura Jane Kelcy Tasha Tanya
Janet Linda Vaughn Nancy Mona
Let’s figure out how to do this.
The problem is 20 ÷ 20. Let’s see what this means: Carla has 20 cookies and puts them into 20 groups. How many cookies will be in each group?
Next we will make 20 groups-one for each girl present.
Then begin adding one cookie to each group until you have used all of the cookies.
Laura Carla
Marsha Janet
Mother DawnJasmine Candice
Tara Ashley Shannon Leslie
Jane Kelcy Tasha Tanya
Linda Vaughn Nancy Mona
Laura Carla
Marsha Janet
Mother DawnJasmine Candice
Tara Ashley Shannon Leslie
Jane Kelcy Tasha Tanya
Linda Vaughn Nancy Mona
There is one cookie in each group so each girl receives one cookie.
How do you think you’ll write the complete division problem?
20 ÷ 20 = 1
Marsha Tara Ashley Shannon Leslie
Carla Mother Dawn Jasmine Candice Laura Jane Kelcy Tasha Tanya
Janet Linda Vaughn Nancy Mona
Everyone sang happy birthday to Carla.
Every girl had one cookie.
And everyone ate one cookie.
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