Topic Three (1.3): Prime Factorisation
Introduction
This topic looks at how a number can be written as a product of its prime factors.
Warm Up
First complete the skill checker on page 14.
Working through your course book
- Start by watching this video, which introduces prime factorisation:
WATCH – Prime Numbers - Factorisation (MathsWatch) Links to an external site.
- Read and make notes on pages 14-15, copying out the worked example (we shall be looking at page 16 – HCF and LCM next lesson).
- Now see if you can answer the Band 2, questions 7-10 on page 17.
- If you would like more practice, then work through these lessons on the MyMaths website:
EXPLORE – Highest common factors (MyMaths)(slides 1-4) Links to an external site.
- You may also want to watch the following YouTube video:
Plenary
You have a choice: you can end this lesson by playing a maths game, or watching a video (or even both, if you have time!)
Game-time!
We end this lesson with a matching pairs game using prime factorisation:
PLAY – Prime factorisation - pairs activity (MyMaths) Links to an external site.
Video
Discover how prime numbers are used in security, to help keep your information safe!
WATCH - The Prime Number Code (Twig) [Not available on Sample course]
Support activities for this topic
Band 1, question 1 on page 17 will help build your skills on this topic.
Extension activities for this topic
There are no extension activities today; we will be looking at more challenging material next lesson when we consider the application of prime factorisation.