# Long multiplication

In this lesson, we will explore area models using Dienes blocks to represent multiplication. This is connected to the steps involved in long multiplication and we will then gain experience with the formal algorithm.

#### 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 area model?

1/5

Q2.When trying to estimate 153 x 4, which derived number fact is important to know?

2/5

Q3.When calculating 313 x 4, which estimation would be most efficient?

3/5

Q4.Summer turned to page one of her maths test and saw the question was 2534 x 6. Last week they were taught both mental strategies and formal written methods and is unsure which one to use. Why would the formal written method be better to use for this question?

4/5

Q5.Daniel completed his work in class but when it was marked, he found he had got the following question wrong. He is confused as he is sure he is right and the teacher is wrong! But if he has made a mistake, where is it?

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 area model?

1/5

Q2.When trying to estimate 153 x 4, which derived number fact is important to know?

2/5

Q3.When calculating 313 x 4, which estimation would be most efficient?

3/5

Q4.Summer turned to page one of her maths test and saw the question was 2534 x 6. Last week they were taught both mental strategies and formal written methods and is unsure which one to use. Why would the formal written method be better to use for this question?

4/5

Q5.Daniel completed his work in class but when it was marked, he found he had got the following question wrong. He is confused as he is sure he is right and the teacher is wrong! But if he has made a mistake, where is it?

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:

# Long multiplication and area models quiz

What a jam packed lesson that was! Well done everyone for your hard work and focus...now it is time to see how much has been embedded and how confident you are with the new strategies taught. As always, take your time, read the questions carefully. Best of luck!

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:

# Long multiplication and area models quiz

What a jam packed lesson that was! Well done everyone for your hard work and focus...now it is time to see how much has been embedded and how confident you are with the new strategies taught. As always, take your time, read the questions carefully. Best of luck!

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

# Lesson summary: Long multiplication

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga