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Fractions. This is my little fact file on fractions!. What is a Fraction?. A fraction is a way of measuring part of a whole. It is made up of 2 parts, called the Numerator and the Denominator. I shall explain what these are if you click on the screen!. Numerator.

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Presentation Transcript
fractions

Fractions

This is my little fact file on fractions!

slide2

What is a Fraction?

A fraction is a way of measuring part of a whole.

It is made up of 2 parts, called the Numerator and the Denominator.

I shall explain what these are if you click on the screen!

numerator
Numerator

The numerator is the top number of a fraction. It shows how many equal parts are required.

For example:

¼ = 1 divided by 4 (the numerator is 1)

which means 1 part of something that’s split into 4 equal pieces!

denominator
Denominator

The denominator is the bottom number of a fraction. It shows how many equal parts the object is divided into.

For example:

¾ = 4 equal parts altogether but only 3 of them are being used!

how to represent a fraction
How to represent a Fraction

Fractions can be written as a number divided by another number

e.g. ½, ¼

Or as a decimal

e.g. 0.5, 0.25

improper fractions

Improper and Proper Fractions

Improper Fractions

A Proper Fraction is one that has a smaller numerator than denominator

e.g. ½, ¼, ¾

An Improper Fraction is one that has a larger numerator than denominator

e.g. 6/4, 9/7, 5/3

These can also be represented as Mixed Fractions

e.g. 6/4 = 1½, 9/7 = 12/7, 5/3 = 12/3,

equivalent fractions
Equivalent Fractions

Equivalent Fractions are those that look different but mean the same

e.g. ½ = 2/4 = 3/6 = 4/8 = 5/10

OR

1/3 = 2/6 = 3/9 = 4/12 = 5/15

OR

24/16 = 3/2 = 1½

adding fractions
Adding Fractions

Fractions can be added together.

If the denominator is the same for all parts then it is simply a case of adding the numerators together

e.g. ¼ + 2/4 = ¾

If the denominator is different then you must try to use equivalent fractions to change the parts into the same denominator

e.g.½ + ¼ = 2/4 +¼ = ¾

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