# Find the total or difference given a part

In this lesson, we will learn how to find the total or difference between numbers in a given ratio, when provided with one part of that ratio. We will model solutions using part-part-whole bar models and solve problems in context.

#### 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.Amjeet and Harry share some money in the ratio 5 : 3. Harry receives £24. How much does Amjeet receive?

1/3

Q2.Amjeet and Harry share some money in the ratio 5 : 3. Harry receives £24. How much money did they share?

2/3

Q3.Eva, Teddy and Sophie share some money in the ratio 2 : 7 : 5. Eva receives £30. How much more money did Teddy get than Sophie?

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.Amjeet and Harry share some money in the ratio 5 : 3. Harry receives £24. How much does Amjeet receive?

1/3

Q2.Amjeet and Harry share some money in the ratio 5 : 3. Harry receives £24. How much money did they share?

2/3

Q3.Eva, Teddy and Sophie share some money in the ratio 2 : 7 : 5. Eva receives £30. How much more money did Teddy get than Sophie?

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:

# Find the total or difference given a part

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

Q1.Eva and Jess share some sweets in the ratio 2 : 7. Jess receives 42 sweets. How many sweets did Eva receive?

1/3

Q2.Eva and Jess share some sweets in the ratio 2 : 7. Jess receives 42 sweets. How many sweets did they have in total?

2/3

Q3.David and Jasmine share some football cards in the ratio 5 : 9. Jasmine gets 12 more cards than David. How many cards did they share in total?

3/3

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

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

# Find the total or difference given a part

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

Q1.Eva and Jess share some sweets in the ratio 2 : 7. Jess receives 42 sweets. How many sweets did Eva receive?

1/3

Q2.Eva and Jess share some sweets in the ratio 2 : 7. Jess receives 42 sweets. How many sweets did they have in total?

2/3

Q3.David and Jasmine share some football cards in the ratio 5 : 9. Jasmine gets 12 more cards than David. How many cards did they share in total?

3/3

# Lesson summary: Find the total or difference given a part

## 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