# Subtracting positive numbers

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

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.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

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.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

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:

# Subtracting Positive Numbers

Have a go at the questions below!

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

Quiz:

# Subtracting Positive Numbers

Have a go at the questions below!

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

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga