Negative scale factors
Slide deck
Download slide deck
Lesson details
Key learning points
- In this lesson, we will learn about negative scale factors and explore the commutativity of multiplication.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
Video
Share with pupils
Loading...
8 Questions
Q1.
Fill in the gap: Multiplication when viewed as scaling can be thought of as a ___________.
multiplication
scale factor
scaling
Q2.
Fill in the gap: Looking at the diagram below we can use a ___________ to describe how much the number was scaled by.
multiplication
scaling
stretch
Q3.
Fill in the gap: In the diagram below the top arrow can be visualised as stretching -10 by a scale factor of_____.
-10
-3
-30
Q4.
Calculate the following product: 9 x (-12)
-112
108
92
Q5.
Calculate the following product: 0.5 x (-12)
-24
24
6
Q6.
Which calculation best represents the unlabelled arrow?
2 x (-5) = -10
4 x (-5) = -20
6 x (-5) = -30
Q7.
Which calculation best represents the unlabelled arrow.
1 x (-5) = -5
3 x (-5) = -15
None of the above
Q8.
Calculate: 3 x (-2) + 7 x (-3) - (-27)
-15
-30
27
7 Questions
Q1.
Which set of words fill in the gaps in order best? Multiplication by a negative _____________ can be visualised as a _________ in the _____________ direction.
scalar, swing, other
scale factor, stretch, positive right
scales, pull, opposite
Q2.
Select the calculation that the red arrow represents in relation to the given arrow of 5 and state the scale factor
(-3) x 5 = -15 s.f: -5
3 x 5 = 15 s.f: 3
3 x 5 = 15 s.f: 5
Q3.
Which number completes the calculation: ____ x 7 = -21
-28
28
3
Q4.
Which number completes the calculation: (-5) x 2 = (-30) + ____
-10
-20
10
Q5.
Calculate 7 x (-2)
-9
14
5
9
Q6.
Calculate 7 x (-1/2)
-14
14
3.5
Q7.
2 + (-4) x 3 =
-18
-24
-6