Lesson details

Key learning points

  1. In this lesson, we will explore multiplication involving at least one positive number and learn how it is possible to visualise multiplication as a stretch by a scale factor.

Licence

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5 Questions

Q1.
Which word best completes the gap: -14 and 14 are additive inverses as they sum to ____
negative
subtraction
the same thing
twenty eight
Correct answer: zero
Q2.
Which words (in order) best complete this sentence: __________________________ can be viewed as the ________________________ of the additive inverse.
Addition, addition
Correct answer: Subtraction, addition
Subtraction, subtraction
Q3.
Complete the gap: -3 - (-5) = (-3) + _____
-1
-5
-8
2
Correct answer: 5
Q4.
Which calculation gives the smallest answer?
-9-(-12)
Correct answer: (-9)-12
9 - (-12)
9- 12
Q5.
Which calculation gives the largest answer?
-9-(-12)
(-9)-12
Correct answer: 9 - (-12)
9- 12

8 Questions

Q1.
Fill in the gap: Multiplication when viewed as scaling can be thought of as a ___________.
multiplication
scale factor
scaling
Correct answer: stretch
Q2.
Fill in the gap: Looking at the diagram below we can use a ___________ to describe how much the number was scaled by.
An image in a quiz
multiplication
Correct answer: scale factor
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_____.
An image in a quiz
-10
-3
-30
Correct answer: 3
Q4.
Calculate the following product: 9 x (-12)
Correct answer: -108
-112
108
92
Q5.
Calculate the following product: 0.5 x (-12)
-24
Correct answer: -6
24
6
Q6.
Which calculation best represents the unlabelled arrow?
An image in a quiz
2 x (-5) = -10
Correct answer: 3 x (-5) = -15
4 x (-5) = -20
6 x (-5) = -30
Q7.
Which calculation best represents the unlabelled arrow.
An image in a quiz
Correct answer: 0.5 x (-5) = -2.5
1 x (-5) = -5
3 x (-5) = -15
None of the above
Q8.
Calculate: 3 x (-2) + 7 x (-3) - (-27)
-15
-30
Correct answer: 0
27

Lesson appears in

UnitMaths / Positive and negative numbers