Embedded Files
Introduction
Introduction
Watch the video for an introduction to the lesson.
Activity 1 - Subtracting negative numbers
Activity 1 - Subtracting negative numbers
Start by watching the video below to learn how to subtract 5 – (-3).
Complete the tasks below in your exercise book or folder, making sure you draw counters to help you or use the algebra tiles website.
Task 1
Task 1
Represent each of the following using counters and then write their total as a single number.
1 – 4
(−3) – (−4)
6 – (−3)
4 – (−2)
1 – (−3)
(−2) – 4
(−1) – 3
0 – (−3)
3 – 5
2 – (−1)
What do you notice? What do you wonder?
Task 2
Task 2
Try these mixed questions.
3 + (−3)
(−7) + (−8)
6 + (−3)
(−8) + (−4)
7 + (−8)
(−4) + 6
(−6) + 3
0 + (−9)
8 + (−3)
2 + (−7)
What do you notice? What do you wonder?
Task 3
Task 3
Slightly harder
(−6) + 2 – 9
(−3) – (−6) + (−4)
(−2) + 2 – (−8)
(−3) + 5 – 6
1 + (−6) – (−2)
What do you notice? What do you wonder?
Activity 2 - Integer wars again
Activity 2 - Integer wars again
Have another go at playing Integer wars with a friend or family member.
You will need:
deck of cards
pencil and paper
Watch the video if you need a reminder of how to play.
This time, you will subtract the two cards, choosing which way you wish to subtract. I.e. Red 5 and Black 4 could be (-5) – 4 or 4 – (-5).
Activities too hard?
Activities too hard?
Use The Mathenæum website to practise adding with negative numbers.
You could play the Tug of War game instead of Integer wars.
Activities too easy?
Activities too easy?
Task 1
Task 1
Complete the Negative number magic squares worksheet. Try completing some magic squares of your own.
Task 2
Task 2
When building high rise towers and bridges, engineers have the important job of designing them so they are safe and will stay up!
Your task is to think about WHY it would be important for engineers to know how to add and subtract negative numbers in their job.
Fill in the 5 Whys slide with your 5 ideas! After selecting the link, select template to create your own copy of the slide deck.
Handing in your work
Handing in your work
Don't forget to hand in the work you completed today!
Your teacher will have told you to do one of the following:
Upload any digital documents you created and any photos you took of your written work to your Learning Management system (MS Teams, Google Classroom for example).
Email any digital documents you created and any photos you took of your written work to your teacher.
Make sure you keep any hand written work you did in your exercise book or folder as your teacher may need to see these when you are back in class.
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