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Learning How to Add and Subtract! Learning How to Add and Subtract!

Learning How to Add and Subtract! - PowerPoint Presentation

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Uploaded On 2020-07-01

Learning How to Add and Subtract! - PPT Presentation

By Megan Hickam If you are looking at these activities at home have a parent or adult help you What is addition Definition If A and B are nonnegative numbers then we can define the sum AB as the total numbers then we can define the sum AB as the total number of objects we will have if ID: 791345

beans books give jelly books beans jelly give pieces cupcakes toys friend left toy total sugar cups count cake

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Presentation Transcript

Slide1

Learning How to Add and Subtract!

By: Megan Hickam

If you are looking at these activities at home have a parent or adult help you

Slide2

What is addition?

Definition:

If A and B are non-negative numbers, then we can define the sum A+B as the total numbers, then we can define the sum A+B as the total number of objects we will have if we start with A objects and then get B more objects

Slide3

BUT WHAT DOES THIS MEAN?!?!?!?!?!?!?!?!

Slide4

Who likes candy?

What is your favorite kind?

Slide5

CANDY EXAMPLE PROBLEM

Your teacher gives you 2 recces pieces. At lunch time your friend gives you 1 more recess pieces. How many pieces of recess pieces do you have?

Slide6

How many recces pieces did your teacher give you?

2

pieces

Slide7

How many

more recces pieces did your friend give you at lunch

1Piece

Slide8

How many recess pieces do you have now?

How many pieces did your teacher give you?

How many pieces did you friend give you?

Count the total number of pieces. How many pieces did you count?

Slide9

HOW many total recess pieces do you have?

1

2

3

3 recess pieces

total

Slide10

Using numbers!

2

1

+

=

3

Slide11

Do you get it?

Try these examples on your own use the candy problem to help you

Slide12

Your mom gives you 5 vanilla cupcakes and 5 chocolate cupcakes to share with your friends. How many cupcakes did your mom give you?

Slide13

How many vanilla cupcakes did your mom give you?

5

vanilla cupcakes

Slide14

How many chocolate cupcakes did you mom give you?

5

chocolate cupcakes

Slide15

How many cupcakes did your mother give you to share with your friends?

COUNT THE CUPCAKES!

Slide16

Count the cupcakes

10 cupcakes to share

1

2

3

4

5

6

7

8

9

10

Slide17

What did we just do?

WE ADDED!

5 vanilla cupcakes

+

5 chocolate cupcakes

=

10 cupcakes!!!!

Slide18

You and your friend are each making a cake. The recipe calls for 2 cups of sugar. How much sugar will you and your friend need to make 2 cakes?

Slide19

How much sugar does one cake recipe require?

1

2

Slide20

How much sugar will two cake recipes require?

Count the number of cups!

Slide21

How much sugar will two cake recipes require?

Count the number of cups!

1

2

3

4

Slide22

What did we just do?

2 cups = 1 cake

2 cups = 1 cake

+

=

?

Slide23

4 cups of sugar!

Slide24

What is subtraction?

Definition:

If A and B are non-negative numbers such that A is greater than or equal to B, then we can define the difference A-B as the total number of objects we will have if we start with A objects and take away B of those objects.

Slide25

BUT WHAT DOES THIS MEAN?!?!?!?!?!?!?!?!

Slide26

Who likes toys?

Slide27

Toy example problem

You bring 4 toys to school. You let one of your friends borrow 1 toy. How many toys do you have left to play with?

Slide28

How many toys did you bring to school?

4

toys

Slide29

How many toys did you let your friend borrow?

1

toy

Slide30

How many toys do you have left?

Toy you gave to your friend

Slide31

How many toys do you have left?

1

2

3

You have 3 toys left!!!!!!!

Slide32

What did we just do?

We subtracted!!!!

You start with 4 toys and then you give 1 toy to your friend

4 toys

-

1 toy

=

3 toys

Slide33

Do you get it?

Try these examples on your own use the toy problem to help you

Slide34

You are going to the library to get some books. You get 5 books. When you get home your sister asks you if she can read some of your books. You give your sister 2 books. How many books do you have to read now?

Slide35

How many books did you get at the library?

1

2

3

4

5

5 books

Slide36

How many books did you give your sister?

1

2

2 books

Slide37

How many books do you have left?

Books you give your sister

Slide38

How many books do you have left?

1

2

3

3 books

Slide39

What did we just do?

You start with 5 books and you gave 2 to your sister

-

=

5 books

2 books

3 books

We subtracted!!!!

Slide40

You have 10 jelly beans. You want to share your jelly beans with your friend. You give your friend 6 jelly beans. How many jelly beans do you have left to eat?

Slide41

How many jelly beans did you start with?

1

2

3

4

5

6

7

8

9

10

10 jelly beans!!!

Slide42

How many jelly beans did you give to your sister

6 jelly beans

1

2

3

4

5

6

Slide43

How many jelly beans do you have left?

6 Jelly beans you gave your friend

Slide44

How many jelly beans do you have left?

1

2

3

4

4 jelly beans

Slide45

What did we just do?

10 jelly beans

6 jelly beans

-

=

4 jelly beans!!!

We subtracted!!!

Slide46

Visit our class website for additional adding and subtracting resources

Click the candy bar to get back to our class website!