# Using bar models to represent addition and subtraction word problems

In this lesson, we will use our knowledge of bar models to interpret if a word problem requires addition or subtraction.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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!

Q1.3kg and 360g + 5kg and 575g

1/4

Q2.6L and 576ml - 3L and 145ml

2/4

Q3.Match the word problem to the bar model.

3/4

Q4.Match the bar model to the word problem.

4/4

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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!

Q1.3kg and 360g + 5kg and 575g

1/4

Q2.6L and 576ml - 3L and 145ml

2/4

Q3.Match the word problem to the bar model.

3/4

Q4.Match the bar model to the word problem.

4/4

# 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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Using bar models to represent addition and subtraction word problems

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.3kg and 600g + 2kg and 400g

1/8

Q2.3kg and 600g + 2kg and 400g

2/8

Q3.Fill in the blanks

3/8

Q4.Fill in the blanks

4/8

Q5.Match the word problem with the correct bar model

5/8

Q6.Match the word problem with the correct bar model

6/8

Q7.What is the calculation required to solve this word problem?

7/8

Q8.What is the calculation required to solve this word problem?

8/8

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Using bar models to represent addition and subtraction word problems

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.3kg and 600g + 2kg and 400g

1/8

Q2.3kg and 600g + 2kg and 400g

2/8

Q3.Fill in the blanks

3/8

Q4.Fill in the blanks

4/8

Q5.Match the word problem with the correct bar model

5/8

Q6.Match the word problem with the correct bar model

6/8

Q7.What is the calculation required to solve this word problem?

7/8

Q8.What is the calculation required to solve this word problem?

8/8

# Lesson summary: Using bar models to represent addition and subtraction word problems

## 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