# Short multiplication

In this lesson, we will using the formal written layout to multiply numbers with up to four digits by a single digit, looking at it with both pictorial, concrete and abstract representation. We will then develop our strategy to understand how to use the same method to multiply by 2-digit multiples of ten.

#### 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.Which of the following number sentences would be the most efficient choice to use when estimating 237 x 4

1/5

Q2.Which estimation is correct for the calculation 192 ÷ 8?

2/5

Q3.During the lesson today, Daniel created an area model to help with his mental strategies. But he forgot to record the calculation! Can you identify the original question?

3/5

Q4.I rounded a calculation and got the estimated answer of 560. But what was my original sum?

4/5

Q5.Which of the following calculations would provide you with the value indicated on the marked number line after it is rounded to create an estimated answer?

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.Which of the following number sentences would be the most efficient choice to use when estimating 237 x 4

1/5

Q2.Which estimation is correct for the calculation 192 ÷ 8?

2/5

Q3.During the lesson today, Daniel created an area model to help with his mental strategies. But he forgot to record the calculation! Can you identify the original question?

3/5

Q4.I rounded a calculation and got the estimated answer of 560. But what was my original sum?

4/5

Q5.Which of the following calculations would provide you with the value indicated on the marked number line after it is rounded to create an estimated answer?

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:

# Short Multiplication Quiz

So today we were able to represent formal short multiplication in both abstract and pictorial form. Remember, you have the choose to use different strategies based on both your confidence and the context of the question. I know you have worked very hard during the lesson but there is still the quiz to go! I have no doubt you will do really well so take your time and relax. Good luck everyone.

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:

# Short Multiplication Quiz

So today we were able to represent formal short multiplication in both abstract and pictorial form. Remember, you have the choose to use different strategies based on both your confidence and the context of the question. I know you have worked very hard during the lesson but there is still the quiz to go! I have no doubt you will do really well so take your time and relax. Good luck everyone.

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

# Lesson summary: Short multiplication

## 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