Introduction to fractions

• Mathematics
• Lower Secondary (Key Stage 3)

Introduction to fractions

How do you feel about fractions?

😒🙁😐🙂😃

How confident are you with percentages?

😒🙁😐🙂😃

And what about decimals?

😒🙁😐🙂😃

Let's start with fractions!

What do you know about fractions?

A fraction is...

• A whole divided into equal parts
• The parts must be equal
• English words for fractions are usually the number + -th
• For example sixth, tenth, hundredth, thousandth
• Irregular words are half, third, quarter. 

What fraction is one piece of this garlic bread?

Now draw some fractions!

We can also find a fraction of something bigger than one

There are 20 people in this slide.

• If half are female, how many is that?
• If a quarter have blue lanyards, how many is that?

Match up these fractions of 24:

1/2  =

 1/4  =

1/6  =

1/8  =

  3/4  =

18

12

6

 3

 4

Further practice

Have a look at these Level 1 questions:

How do you calculate the fraction of puppies sold?

Calculate the number of puppies sold that were collies

• 60 puppies in total
•  30 are Cockapoo
• 10 are poodles
• 60 - 40 = 20 collies
• collies / total dogs sold =20/60
• Simplify 2/6 = 1/3

10 out of 30 people like cats. Write this as a fraction.

1. 30/10
2. 10/30
3. 1/3
4. 20/30

If there are 50 cars in the car park and 20 are red, what fraction are red?

1. 2/5
2. 3/5
3. 30/50
4. 20/50

Ten people watch a film and three don't like it. What fraction of people like the film?

1. 3/10
2. 30 %
3. 7/10
4. 70 %

Out of 100 people surveyed, 35 holiday in Northern Ireland, 25 in Spain and the rest go to Italy. What fraction go to Italy? Simplify your answer.

1. 35/100
2. 40/100
3. 4/10
4. 2/5

How do you feel about fractions now?

I still don't get it!

I feel confident that I can find, create and simplify fractions

I would like to work on this a bit more