# Word Problems: Bar models

In this lesson, we will learn how to solve addition and subtraction word problems with the help of bar models.

#### 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 calculation is need to solve the following word problem: Sally bought used 13 bricks yesterday. Today she she used another 27. How many bricks did she use altogether?

1/3

Q2.Solve the following word problem: Rebecca has 32 shirts in her wardrobe. She gives away 16. How many shirts does she have left?

2/3

Q3.What is the inverse of the following equation? 52-25=27

3/3

#### 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 calculation is need to solve the following word problem: Sally bought used 13 bricks yesterday. Today she she used another 27. How many bricks did she use altogether?

1/3

Q2.Solve the following word problem: Rebecca has 32 shirts in her wardrobe. She gives away 16. How many shirts does she have left?

2/3

Q3.What is the inverse of the following equation? 52-25=27

3/3

# 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:

# Addition and Subtraction Word Problems

This quiz will help you assess what you have learned in this lesson.

Q1.Solve the following word problem: Bob the builder worked for 28 days last month. This month he worked 18 days. How many days has he worked altogether?

1/3

Q2.Solve the following word problem: There were 51 builders on site. 32 were building houses and the rest were driving diggers. How many builders were driving diggers?

2/3

Q3.Solve the following word problem: Ms. Dobrowolski bought 54 bricks at the store. She used 38 of them to start building a summer house. How many bricks does she have left?

3/3

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

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

# Addition and Subtraction Word Problems

This quiz will help you assess what you have learned in this lesson.

Q1.Solve the following word problem: Bob the builder worked for 28 days last month. This month he worked 18 days. How many days has he worked altogether?

1/3

Q2.Solve the following word problem: There were 51 builders on site. 32 were building houses and the rest were driving diggers. How many builders were driving diggers?

2/3

Q3.Solve the following word problem: Ms. Dobrowolski bought 54 bricks at the store. She used 38 of them to start building a summer house. How many bricks does she have left?

3/3

# Lesson summary: Word Problems: Bar models

## 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:
Chair yoga