Page 177 - Math Smart - 7

CHAPTER 8.1
In this chapter

Pupils should be able to:
Understanding Fractions • understand and use

fraction notation
recognising that
8.1.1 Parts of 0 whole fractions are several
parts of one whole

^ and ^ are examples of fractions. They are parts of a whole.
A fraction has a numerator and a denominator.
O Spotlight
The number above is called the numerator.
The number below is called the denominator.
The word fraction
comes from the Latin
word "frangere" which
The denominator shows the
parts of a whole means "to break". The
number of equal parts a whole is
total number of equal parts history of fractions goes
divided into. The numerator shows
back to the Babylonians
the number of parts we have.
(who lived where Iraq is
today) and the ancient
Egyptians.
Example 1

The figure is divided into equal parts.
a) What fraction of the figure is coloured?
b) What fraction of the figure is not coloured?

Solution
The figure Is divided into 9 equal parts.
a) 4 parts are coloured.
So, ^ of the figure is coloured.

b) 5 parts are not coloured.
So, I of the figure is not coloured.

The figure is divided into equal parts.
How many more parts must be coloured to show^
?
Solution
The figure is divided into 12 equal parts.
5 parts are coloured.
To show . 11 parts must be coloured.
11-6 = 5
So, 5 more parts must be coloured to show .