1 Multiplying fractions: Created by James Harris [email protected].
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Transcript of 1 Multiplying fractions: Created by James Harris [email protected].
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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
