# Associativity

In this lesson, we will learn about the associative property and how it can make calculations easier.

#### 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.Fill in the blank in the following model to represent the calculation 4×9=9×4/ What would go in the top box?

1/5

Q2.If one yellow rod is length 3, what calculation works out the total lengths of the yellow rods?

2/5

Q3.There are 60 sweets in total. Zaki shares the sweets between 10 people. How much do they each get? Which calculation shows this problem, and is it grouping or sharing?

3/5

Q4.There are 60 sweets in total. Zaki puts the sweets into bags of 10 sweets. How many bags are there? Which calculation shows this problem, and is it grouping or sharing?

4/5

Q5.Which one of the following is commutative?

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.Fill in the blank in the following model to represent the calculation 4×9=9×4/ What would go in the top box?

1/5

Q2.If one yellow rod is length 3, what calculation works out the total lengths of the yellow rods?

2/5

Q3.There are 60 sweets in total. Zaki shares the sweets between 10 people. How much do they each get? Which calculation shows this problem, and is it grouping or sharing?

3/5

Q4.There are 60 sweets in total. Zaki puts the sweets into bags of 10 sweets. How many bags are there? Which calculation shows this problem, and is it grouping or sharing?

4/5

Q5.Which one of the following is commutative?

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:

# Associativity

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

Q1.Fill in the blank: 15 x 16 = 15 x (___ x 8)

1/5

Q2.Fill in the blank: 15 x 16 = (5 x ___) x 16

2/5

Q3.Fill in the blank: 36 x 25 = ___ x 100

3/5

Q4.Fill in the blank: 55 x 20 = ___ x 100

4/5

Q5.Fill in the blank: 2.2×50 = ___ x 100

5/5

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

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

# Associativity

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

Q1.Fill in the blank: 15 x 16 = 15 x (___ x 8)

1/5

Q2.Fill in the blank: 15 x 16 = (5 x ___) x 16

2/5

Q3.Fill in the blank: 36 x 25 = ___ x 100

3/5

Q4.Fill in the blank: 55 x 20 = ___ x 100

4/5

Q5.Fill in the blank: 2.2×50 = ___ x 100

5/5

# Lesson summary: Associativity

## 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