Year 4 equivalent fractions

Fractions Lesson 3Understanding equivalent fractionsAn interactive Qwizdom lesson

These numbers are called

fractions12 3

15

56

23

47

1222

Today’s lesson looks at

Equivalent fractions

34

68

WALT : to understand equivalent fractions and

decide if fractions are equal

34

68

In the word equivalentthere is the root word

equal

34

68

Fractions which are said to be equivalent are equal to

each other.

34

68

For example

12

24

So if you were given 2 quarters of a cake and your friend was given half a cake

would you both have the same amount?12

24

Yes!These fractions are equal.

12

24

These are equivalent fractions.

Can you tell if the following fractions are

equal?Are they equivalent

fractions?12

36

Yes these fractions are equal.

They are equivalent fractions.

12

36

Are they equivalent fractions?

23

46

Yes they are equivalent fractions.

23

46

Are they equivalent fractions?

14

312

Yes they are equivalent fractions.

14

312

Are they equivalent fractions?

13

2 5

No, they are not equal.They are not equivalent

fractions.

13

2 5

Here are some equivalent fractions.

Can you work out a strategy for deciding

whether they are equal?

14

2 8

Here are some equivalent fractions.

Can you work out a strategy for deciding

whether they are equal?

25

4 10

Here are some equivalent fractions.

Can you work out a strategy for deciding

whether they are equal?

13

3 9

Use thinking time to discuss.

312

1 4

Use thinking time to discuss.

1 2

5 10

What ideas have you come up with?

1 2

5 10

Explain your strategy to the class.

1 2

5 10

There is a relationship between the fractions

using dividing and multiplying.

1 4

5 20

What ever you do to the top number . . You must do to the

bottom number.

1 4

5 20

What ever you do to the top number . . You must do to the

bottom number.

1 5

5 20

divide by 5

divide by 5

What ever you do to the top number . . You must do to the

bottom number.

1 2

2 4

divide by 2

divide by 2

What ever you do to the top number . . You must do to the

bottom number.

1 4

3 12

divide by 3

divide by 3

What ever you do to the top number . . You must do to the

bottom number.

1 5

4 20

divide by 4

divide by 4

What ever you do to the top number . . You must do to the

bottom number.

1 4

2 8

divide by 2

divide by 2

What ever you do to the top number . . You must do to the

bottom number.

9 15

3 5

multiply by 3

multiply by 3

What ever you do to the top number . . You must do to the

bottom number.

4 18

2 9

multiply by 2

multiply by 2

What is the missing number?

2 10

1 5

Click for answer

What is the missing number?

2 4

4 8

Click for answer

What is the missing number?

4 5

32 40

Click for answer

Sometimes you might need to work out equivalent fractions in

three steps.

6 8

48 64

3 4

Divide by 8

Divide by 8

Divide by 2

Divide by 2

Sometimes you might need to work out equivalent fractions in

three steps.

6 10

48 80

3 ?

Divide by 8

Divide by 8

Divide by 2

Divide by 2

What is the missing number?

Click for answer

5

Sometimes you might need to work out equivalent fractions in

three steps.

6 10

48 80

3 ?

Divide by 8

Divide by 8

Divide by 2

Divide by 2

What is the missing number?

Click for answer

LO: To revise work equivalent fractions

I understand these ideas fully.

I have some understanding but I need more practice.

I don’t understand these ideas at all and need to work again on this unit of work.

A

B

C

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