Topic Three (1.3): Multiplying and Dividing negative numbers

Introduction Icon.png Introduction

We now look at multiplying and dividing negative numbers.

Hint: When multiplying, or dividing, positive and negative integers, please remember the following:

  • If the signs of the two numbers being multiplied or divided are different, the answer will be negative.
  • If the signs of the two numbers being multiplied or divided are the same, the answer will be positive.

Consolidate Icon.png Warm Up

First complete the skill checker on page 103.

Interact Icon.png Working through your course book

  • Start by watching this video, which introduces the topic nicely:

WATCH – Directed Numbers - Multiplying and Dividing (MathsWatch) Links to an external site.

  • Read and make notes on pages 103-104, copying out the worked examples.
  • Now see if you can answer the Band 2 questions on pages 105-106.
  • If you would like more practice, then work through these lessons on the MyMaths website (slides 6-9):

EXPLORE – Negative numbers 2 (MyMaths) (slides 6-9) Links to an external site.

  • You may also want to watch the following Corbettmaths videos, the first on multiplication and the second on division:

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!

Another tug of war game, this time using your knowledge of multiplying and dividing negative numbers:

PLAY – Tug of War (MyMaths) Links to an external site.

Video 

This video discusses why and when negative numbers were developed:

WATCH – India and Negative Numbers (Twig)  [Not available on sample course]

Bridge Icon.png Support activities for this topic

The Band 1 questions on pages 104-105 will help build your skills on this topic.

Stretch Icon.png Extension activities for this topic

If you would like more of a challenge on this topic, go to pages 106-107 and attempt the Band 3 questions.