# Using factors to multiply

In this lesson, we will begin by introducing the context of synchronized swimmers arranged in groups within squads to multiply three numbers in different arrangements. They use different factor pairs to solve the same problem in different ways. We will also look at distributive law can be represented using area 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 represented by the dienes shown below?

1/5

Q2.What four products are missing from the area model shown?

2/5

Q3.What calculations do the dienes represent below?

3/5

Q4.Using your knowledge of multiplying with multiples of ten, can you identify the correct answer for 29 x 21?

4/5

Q5.Look at the calculation carefully. There is an error but the pupils can't decide where! Which pupil is right?

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.What calculation is represented by the dienes shown below?

1/5

Q2.What four products are missing from the area model shown?

2/5

Q3.What calculations do the dienes represent below?

3/5

Q4.Using your knowledge of multiplying with multiples of ten, can you identify the correct answer for 29 x 21?

4/5

Q5.Look at the calculation carefully. There is an error but the pupils can't decide where! Which pupil is right?

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:

# Using factors to multiply quiz

Today we looked at various strategies to enable us to use our knowledge of factors to multiply. We used bar models, area models, partitioning and distributive law to represent different calculations. I wonder how much of the learning you can now remember! Take your time on the quiz, relax and if at any point your are not clear about the answer, please return to the video lesson and find the correct section. Good luck everyone!

Q1.Which of the following statements about a prime number is true?

1/5

Q2.Using distributive law, which of the following number statements is FALSE?

2/5

Q3.Look at the bar model below which is similar to other bar models used during the lesson. Which number statement does the bar model correctly represent to help us calculate the total number of swimmers?

3/5

Q4.Below is an area model. What is the product of this area model?

4/5

Q5.During the lesson, we demonstrated how an area model could be arranged to show distributive law after one of the factors was partitioned. If the product for a calculation is 120, what are the two missing values?

5/5

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

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

# Using factors to multiply quiz

Today we looked at various strategies to enable us to use our knowledge of factors to multiply. We used bar models, area models, partitioning and distributive law to represent different calculations. I wonder how much of the learning you can now remember! Take your time on the quiz, relax and if at any point your are not clear about the answer, please return to the video lesson and find the correct section. Good luck everyone!

Q1.Which of the following statements about a prime number is true?

1/5

Q2.Using distributive law, which of the following number statements is FALSE?

2/5

Q3.Look at the bar model below which is similar to other bar models used during the lesson. Which number statement does the bar model correctly represent to help us calculate the total number of swimmers?

3/5

Q4.Below is an area model. What is the product of this area model?

4/5

Q5.During the lesson, we demonstrated how an area model could be arranged to show distributive law after one of the factors was partitioned. If the product for a calculation is 120, what are the two missing values?

5/5

# Lesson summary: Using factors to multiply

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Dance