# Word problems: Whole-part models

In this lesson, we will learn how to use whole-part models to help us solve addition and subtraction 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.Solve the following equation: 41-14=?

1/3

Q2.Solve the following equation: 61-25=?

2/3

Q3.What is the inverse of this equation? 51-25=26

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.Solve the following equation: 41-14=?

1/3

Q2.Solve the following equation: 61-25=?

2/3

Q3.What is the inverse of this equation? 51-25=26

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:

# Solving Addition and Subtraction Word Problems

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

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:

# Solving Addition and Subtraction Word Problems

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

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

# Lesson summary: Word problems: Whole-part models

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga