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Multiplying fractions:

Created by James Harris

Jharris.school@gmail.com

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What’s ½ of 4?

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What’s ½ of 4?

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What’s ½ of 4?

½ of 1

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What’s ½ of 4?

½ of 2 ½ of 3 ½ of 4

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What’s ½ of 4?

How many a red? 44/24/2 = 2

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What’s 1/4 of 2?

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What’s 1/4 of 2?

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What’s 1/4 of 2?

How many a red? 22 / 4 bits2 / 4 = ½

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What’s ½ of 1/3?

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What’s ½ of 1/3?

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What’s ½ of 1/3?

This is 1/3

What’s ½ of it?

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What’s ½ of 1/3?

How big is this?

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What’s ½ of 1/3?

How big is this?

There are 6 parts, one of which is shaded. Therefore: 1/6

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What’s ½ of 1/4?

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What’s ½ of 1/4?

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What’s ½ of 1/4?

This is 1/4What’s ½ of it?

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What’s ½ of 1/4?

How big is this?

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What’s ½ of 1/4?

How big is this?

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What’s ½ of 1/4?

How big is this?

1/8

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What’s ¼ of ½?

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What’s ¼ of ½?

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What’s ¼ of ½?

This is 1/2What’s ¼ of it?

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What’s ¼ of ½?

This is 1/2What’s ¼ of it?

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What’s ¼ of ½?

How big is this?

1/8

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What’s ¾ of ½?

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What’s ¾ of ½?

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What’s ¾ of ½?

This is 1/2What’s ¾ of it?

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What’s ¾ of ½?

This is 1/2What’s ¾ of it?

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What’s ¾ of ½?

How big is this?

3/8

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What’s 2/5 of 1/3?

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What’s 2/5 of 1/3?

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What’s 2/5 of 1/3?

This is 1/3What’s 2/5 of it?

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What’s 2/5 of 1/3?

The1/3 has now been split into 5ths. How many need to be shaded?

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What’s 2/5 of 1/3?

The1/3 has now been split into 5ths. How many need to be shaded?

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What’s 2/5 of 1/3?

How big is this?

Lets split the rest of the ‘1’ into 5ths

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What’s 2/5 of 1/3?

How big is this?

2/15

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What’s 2/7 of 2/3?

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What’s 2/7 of 2/3?

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What’s 2/7 of 2/3?

This is 2/3What’s 2/7 of it?

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What’s 2/7 of 2/3?

This is still 2/3

What’s 2/7 of it?

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What’s 2/7 of 2/3?

Lets split this into 7ths

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What’s 2/7 of 2/3?

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What’s 2/7 of 2/3?

How many need to be shaded?

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What’s 2/7 of 2/3?

How big is this?

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What’s 2/7 of 2/3?

You have to ask, how do you split up the remaining 1/3 into 1/7’s

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What’s 2/7 of 2/3?

Let’s try:

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What’s 2/7 of 2/3?

Let’s try:

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What’s 2/7 of 2/3?

So how many red are shaded?

2/10.5

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Dividing fractions

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2 ÷ 1/3

Is asking how many 1/3’s fit inside 2

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2 ÷ 1/3

This is 1/3, so how many will fit inside 2?

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2 ÷ 1/3

This is 1/3, so how many will fit inside 2?

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2 ÷ 1/3

This is 1/3, so how many will fit inside 2?

6i.e: 2 ÷ 1/3 =6

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2 ÷ 1/4

Is asking how many 1/4’s fit inside 2

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2 ÷ 1/4

This is 1/4, so how many will fit inside 2?

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2 ÷ 1/4

This is 1/4, so how many will fit inside 2?

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2 ÷ 1/4

This is 1/4, so how many will fit inside 2?

8i.e: 2 ÷ 1/4 =8

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4/5 ÷ 1/5

Is asking how many 1/5’s fit inside 4/5

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4/5 ÷ 1/5

Is asking how many 1/5’s fit inside 4/5

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4/5 ÷ 1/5

This is 4/5, how many 1/5’s fit inside

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4/5 ÷ 1/5

This is 4/5, how many 1/5’s fit inside

4

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1/2 ÷ 1/3

Is asking how many 1/3’s fit inside 1/2

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1/2 ÷ 1/3

This is ½, How many 1/3’s fit inside it.

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1/2 ÷ 1/3

This is 1/3, how many of these fit inside this ½

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1/2 ÷ 1/3

How many 1/3’s fit inside the ½?

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1/2 ÷ 1/3

How many 1/3’s fit inside the ½?

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1/2 ÷ 1/3

How many 1/3’s fit inside the ½?

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1/2 ÷ 1/3

1 ½ or

3/2

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1/2 ÷ 1/3 is the same as:

1/2 × 3/1

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This is the same as 1/2 of 3

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This is the same as 1/2 of 3

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This is the same as 1/2 of 3

How many a red? 33/2