# Using bar models for addition and subtraction problems

In this lesson, we will review bar models and match bar models to word problems.

#### 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.What can mass and capacity be measured in?

1/5

Q2.What is the mass of the ice-cream tub?

2/5

Q3.What is the capacity of the container? (Each interval = 25ml)

3/5

Q4.Estimate the mass of the laptop.

4/5

Q5.Estimate the capacity of the wheelie bin.

5/5

#### 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.What can mass and capacity be measured in?

1/5

Q2.What is the mass of the ice-cream tub?

2/5

Q3.What is the capacity of the container? (Each interval = 25ml)

3/5

Q4.Estimate the mass of the laptop.

4/5

Q5.Estimate the capacity of the wheelie bin.

5/5

# 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 for addition and subtraction problems

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

Q1.Bar models are used for...

1/4

Q2.What are the known and unknown values?

2/4

Q3.Match the word problem to the correct bar model.

3/4

Q4.Match the word problem to the correct bar model

4/4

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

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

# Using bar models for addition and subtraction problems

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

Q1.Bar models are used for...

1/4

Q2.What are the known and unknown values?

2/4

Q3.Match the word problem to the correct bar model.

3/4

Q4.Match the word problem to the correct bar model

4/4

# Lesson summary: Using bar models for addition and subtraction problems

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance