# Negative scale factors

In this lesson, we will learn about negative scale factors and explore the commutativity of multiplication.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Fill in the gap: Multiplication when viewed as scaling can be thought of as a ___________.

1/8

Q2.Fill in the gap: Looking at the diagram below we can use a ___________ to describe how much the number was scaled by.

2/8

Q3.Fill in the gap: In the diagram below the top arrow can be visualised as stretching -10 by a scale factor of_____.

3/8

Q4.Calculate the following product: 9 x (-12)

4/8

Q5.Calculate the following product: 0.5 x (-12)

5/8

Q6.Which calculation best represents the unlabelled arrow?

6/8

Q7.Which calculation best represents the unlabelled arrow.

7/8

Q8.Calculate: 3 x (-2) + 7 x (-3) - (-27)

8/8

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Fill in the gap: Multiplication when viewed as scaling can be thought of as a ___________.

1/8

Q2.Fill in the gap: Looking at the diagram below we can use a ___________ to describe how much the number was scaled by.

2/8

Q3.Fill in the gap: In the diagram below the top arrow can be visualised as stretching -10 by a scale factor of_____.

3/8

Q4.Calculate the following product: 9 x (-12)

4/8

Q5.Calculate the following product: 0.5 x (-12)

5/8

Q6.Which calculation best represents the unlabelled arrow?

6/8

Q7.Which calculation best represents the unlabelled arrow.

7/8

Q8.Calculate: 3 x (-2) + 7 x (-3) - (-27)

8/8

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Negative Scale Factors Quiz

Have a go at the questions below to show off what you know!

Q1.Which set of words fill in the gaps in order best? Multiplication by a negative _____________ can be visualised as a _________ in the _____________ direction.

1/7

Q2.Select the calculation that the red arrow represents in relation to the given arrow of 5 and state the scale factor

2/7

Q3.Which number completes the calculation: ____ x 7 = -21

3/7

Q4.Which number completes the calculation: (-5) x 2 = (-30) + ____

4/7

Q5.Calculate 7 x (-2)

5/7

Q6.Calculate 7 x (-1/2)

6/7

Q7.2 + (-4) x 3 =

7/7

Quiz:

# Negative Scale Factors Quiz

Have a go at the questions below to show off what you know!

Q1.Which set of words fill in the gaps in order best? Multiplication by a negative _____________ can be visualised as a _________ in the _____________ direction.

1/7

Q2.Select the calculation that the red arrow represents in relation to the given arrow of 5 and state the scale factor

2/7

Q3.Which number completes the calculation: ____ x 7 = -21

3/7

Q4.Which number completes the calculation: (-5) x 2 = (-30) + ____

4/7

Q5.Calculate 7 x (-2)

5/7

Q6.Calculate 7 x (-1/2)

6/7

Q7.2 + (-4) x 3 =

7/7

# Lesson summary: Negative scale factors

## Time to move!

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For 5 mins...

Move around:
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On the spot:
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