1. 7.1.13
Unit 13: What fraction?
Lesson 1: Thirds

2. 7.1.13
The objective of this lesson is
• to use fraction notation to describe parts of
shapes.

3. 7.1.13
_
_1
6
1
2
_
_2
0
1
2
_
_1
5
5
_
_4
8
3
0
_
_1
0
9
_
_
4
1
_
_
5
4
Cancellations
Name some fractions which are equivalent to
this one.

4. 7.1.13
Cancellations
This fraction means one part of three when a
whole is divided into three equal parts.
_
_
3
1

5. 7.1.13
Is it a third?
In the next few slides identify whether one
third of each shape has been coloured.
If it hasn’t, identify how much has been
coloured.
You should explain how you
worked out your answer.

6. 7.1.13
Is a third of this shape coloured? Yes
Is it a third?

7. 7.1.13
Is a third of this shape coloured? Yes
Is it a third?

8. 7.1.13
Is a third of this shape coloured? No,
_
2
1
Is it a third?

9. 7.1.13
Is a third of this shape coloured? Yes
Is it a third?

10. 7.1.13
Is a third of this shape coloured? No,
_
3
2
Is it a third?

11. 7.1.13
Is a third of this shape coloured? No,
_
9
2
Is it a third?

12. 7.1.13
Is a third of this shape coloured? No,
_
4
3
Is it a third?

13. 7.1.13
Is a third of this shape coloured? No,
_
2
1
Is it a third?

14. 7.1.13
Is a third of this shape coloured? Yes
Is it a third?

15. 7.1.13
Is a third of this shape coloured? No,
_
2
1
Is it a third?

16. 7.1.13
Which circles have one third coloured?
Is it a third?

17. 7.1.13
Which triangles have one third coloured?
Is it a third?
_
4
1
_
6
1
_
9
4
_
4
3
_
2
1 _
6
1