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Addition

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Starting Menu

Select any of the topics you would like to talk about, or just click next to play them all!

What is AdditionThe Addition SymbolAdding Numbers (add apples in your head!)The Equal SignAdding VerticallyAdding ZeroAdding More than 2 NumbersReview Problems

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What is Addition?

Addition is one of the four basic mathematic operations. (The other three are subtraction, multiplication, and division.) Addition is the act of combining two or more numbers together to get one number.

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An Example of Addition

If I have 2 apples and add 3 more, how many apples will I have?

Well, if we start out with two apples…

…and we add three more…

…we now have FIVE apples!

1 2 3 4 5

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More Practice

What if I start out with 3 apples and add 4?

Well, if we start out with three apples…

…and then we add four…

..we get seven apples!

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The Addition Symbol

The addition symbol looks like this:

+

Now, let’s try adding using this symbol!

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Adding with the Addition Symbol

What if we have 2 apples and add 1 more?

+

If we have two apples…

…plus (+) one more…

…we get three apples!

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More Practice

What is 1 apple plus (+) 3 more apples?

+

When we add these apples together, we get four apples!

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Adding with Numbers

Sadly, we won’t always be able to add apples. In math, we have to add numbers too…

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How to Add Numbers

When adding numbers, we can still think of it like adding apples—even if the problem doesn’t say so.

So, when we hear the question: “What’s 3 + 4?” we know exactly what to do.

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Adding Numbers—Example

What’s 3+4?

We can still think of it like an apple question: What’s 3 apples plus 4 apples?

Thinking of it like an “apple question” can help as you learn to add.

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Adding Numbers—Example

So, what is 3 apples plus 4 apples?

We can see that three apples plus four apples is equal to…SEVEN APPLES!

+

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Adding Numbers—Example

However, the question isn’t what is 3 apples + 4 apples? The question is what is 3 + 4? So, the answer isn’t 7 apples, it’s just 7, since we’re working with numbers only—no apples included!

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More Practice

What is 4+1?

Think of it like an “apple question!” What’s 4 apples + 1 apple?

+

4 apples+ 1 apple is 5 apples… so the answer

is 5!

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Even More Practice

What is 2+2?

Think of it like an “apple question!”

( + )

4!

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Even More Practice

What is 1+2?

(“add apples” in your head if you have to.)3

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The Equal Sign

The equal sign sometimes comes at the end of addition problems. It looks like this:

=

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Using the Equal Sign

This is the way we have been writing our math problems:

What is 1+1?

You can also write them like this:

1+1=

They mean the same thing?

2!

2

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Practice with =

4+2=

(Think: What is 4 + 2?)6

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More Practice with =

5+1= 6

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Even More Practice with =

2+5=

3+5=

2+1=

7

8

3

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Another way to write it…

Sometimes, math problems are written vertically, like this:

2

+ 3

5

< This means the same thing

as this:> 2+3=5

They mean the same thing, just written a different way!

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Some More Practice

Solve these math problems.

1+3=

2

+ 5

What is 3 plus 1?

4

7

4

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Even More Practice

Solve these as well.

1+6

What is 1 plus 6?

1

+ 6

7

7

7

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Adding 0

0

This (^) is a zero. It equals nothing. So, if you add 0 to any number, it will equal that same number.

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An Example

5+0=Well, if we start out with five…

…and we add zero, which is nothing…

..we still get five!

5

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Practice with 0

1+0

2+0

3+0

4+0

5+0

6+0

7+0

Hint: they all equal their “starting number.”1

2

3

4

5

6

7

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More Practice with 0

10+0=

3

+ 0

What is 4 plus 0?

10

3

4

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Adding more than 2 Numbers

Adding more than two numbers is easy…you just add more numbers (and plus signs) to the problem.

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An Example

What is 2 apples plus 3 apples plus 4 apples?

+ +

Well, if we start out with 2 apples…

…and add three…

…and then add four more…

…we get 9 apples!

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Practice

2+2+2=

( + + )

6

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More Practice

3 2

3 3

+ 3 +5

9 10

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Even More Practice

1+1+1+1=

4+1+2=

2+3+4+5+6=

4

7

20

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Review of Everything

What is the addition symbol?

What is the equal symbol?

+

=

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Review of Everything

1+1=

2+3+1

6+1=

1+1+1+1+2+1

9+0=

23+0

2+3=

2

6

7

7

9

23

5

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Review of Everything

What is 1 plus 3?

What is 2 plus 2?

What is 9 plus 0?

What is 2 plus 3 plus 1 plus 0?

What is 9 plus 1?

What is 10 plus 2?

What is 0 plus 0?

4

4

9

6

10

12

0

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Review of Everything

1

+2

3

+ 4

5

3

+0

3

7

8

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Review of Everything

3

+9

4

+5

6

+3

12

9

9

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Review of Everything

1

1

1

1

1

1

+1

7

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Congratulations!

You are now “adding experts!”

Don’t forget: if you get stuck “adding apples” in your head, you can add them on paper if you need to. Eventually, you won’t even need to add apples, you’ll be so good!

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Review Menu

Teacher, any concepts you’d like to go over again?What is AdditionThe Addition SymbolAdding Numbers (add apples in your head!)The Equal SignAdding VerticallyAdding ZeroAdding More than 2 NumbersReview Problems