Subtracting positive numbers

In this lesson you will explore the relationship between subtracting positive numbers and adding additive inverses.

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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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Which word best fills in the gap in this sentence: We can think of addition as _____________ a point on the number line.

1/6

Q2.Two numbers are additive inverses if their sum is _____.

2/6

Q3.Which sentence best describes the calculation: 3 +(-4) = -1?

3/6

Q4.What is the additive inverse of -4.2?

4/6

Q5.Joanna thinks the following calculation pair are additive inverses: 10 + (-50) + (-18) and (-10) + 50 + 18. Is she correct?

5/6

Q6.Write the sum that the number line is modelling.

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.Which word best fills in the gap in this sentence: We can think of addition as _____________ a point on the number line.

1/6

Q2.Two numbers are additive inverses if their sum is _____.

2/6

Q3.Which sentence best describes the calculation: 3 +(-4) = -1?

3/6

Q4.What is the additive inverse of -4.2?

4/6

Q5.Joanna thinks the following calculation pair are additive inverses: 10 + (-50) + (-18) and (-10) + 50 + 18. Is she correct?

5/6

Q6.Write the sum that the number line is modelling.

6/6

Video

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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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Subtracting Positive Numbers Quiz

Have a go at the questions below!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.Fill in the gap: Two numbers are additive inverses if their sum is _____.

1/7

Q2.Which words (in order) best complete this sentence: __________________________ can be viewed as the addition of the ____________________________.

2/7

Q3.Which numbers best complete this number sentence in order: 9 - ___ = 9 + ___ = 4

3/7

Q4.Select the calculation that could be represented by this diagram.

Select one (1) boxes

4/7

Q5.Calculate 2-5

5/7

Q6.Calculate (-2)-5

6/7

Q7.Calculate (-2) + (-5)

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Subtracting Positive Numbers Quiz

Have a go at the questions below!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.Fill in the gap: Two numbers are additive inverses if their sum is _____.

1/7

Q2.Which words (in order) best complete this sentence: __________________________ can be viewed as the addition of the ____________________________.

2/7

Q3.Which numbers best complete this number sentence in order: 9 - ___ = 9 + ___ = 4

3/7

Q4.Select the calculation that could be represented by this diagram.

Select one (1) boxes

4/7

Q5.Calculate 2-5

5/7

Q6.Calculate (-2)-5

6/7

Q7.Calculate (-2) + (-5)

7/7

Lesson summary: Subtracting positive numbers

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