# Understanding commutativity

In this lesson, we will explore commutativity - the concept that parts in addition equations can be added together in any order.

#### 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.In the picture there are 5 orange fish and 4 blue fish. Which equation could we use to represent this?

1/3

Q2.In the picture 5 sheep are in the field, 2 are outside the field. Which equation could we use to represent this?

2/3

Q3.I have 3 green apples and 2 red apples. How could I represent my apples as an addition equation?

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.In the picture there are 5 orange fish and 4 blue fish. Which equation could we use to represent this?

1/3

Q2.In the picture 5 sheep are in the field, 2 are outside the field. Which equation could we use to represent this?

2/3

Q3.I have 3 green apples and 2 red apples. How could I represent my apples as an addition equation?

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:

# Understanding commutativity

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

Q1.Choose the most efficient way to add eight and two together.

1/3

Q2.Choose the equation that is equal to 4 + 2

2/3

Q3.In the picture 5 sheep are in the field, 2 are outside the field. Which is the most efficient equation to represent this problem?

3/3

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

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

# Understanding commutativity

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

Q1.Choose the most efficient way to add eight and two together.

1/3

Q2.Choose the equation that is equal to 4 + 2

2/3

Q3.In the picture 5 sheep are in the field, 2 are outside the field. Which is the most efficient equation to represent this problem?

3/3

# Lesson summary: Understanding commutativity

## 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