Topic Three (1.3): Prime Factorisation

Introduction Icon.png Introduction

This topic looks at how a number can be written as a product of its prime factors.

Consolidate Icon.png Warm Up 

First complete the skill checker on page 14.

Interact Icon.png 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:  

Optional Activities Icon.png 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]

Bridge Icon.png Support activities for this topic

Band 1, question 1 on page 17 will help build your skills on this topic.

Stretch Icon.png 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.