# Using arrays to multiply a 2 digit number by a 1 digit number

In this lesson, we will learn to multiply 2 digit numbers by 1 digit numbers using arrays. We will construct suitable arrays to represent a number, and partition them to make a multiplication calculation clearer.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### 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 does the word 'derive' mean?

1/5

Q2.Which of the following are strategies for deriving facts?

2/5

Q3.Which fact can be derived from 2 x 4 = 8

3/5

Q4.What fact can be derived from 6 divided by 2 is equal to 3?

4/5

Q5.Which fact can be derived from 4 x 6 = 24?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### 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 does the word 'derive' mean?

1/5

Q2.Which of the following are strategies for deriving facts?

2/5

Q3.Which fact can be derived from 2 x 4 = 8

3/5

Q4.What fact can be derived from 6 divided by 2 is equal to 3?

4/5

Q5.Which fact can be derived from 4 x 6 = 24?

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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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

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

# Using arrays to multiply a 2 digit number by a 1 digit number

Are you a whizz at multiplying now? You might need a pencil and paper to help you choose the correct answer in this quiz.

Q1.Which is an example of partitioning?

1/6

Q2.Partitioning makes multiplying two digit numbers easier.

2/6

Q3.13 x 5 =

3/6

Q4.17 x 3 =

4/6

Q5.18 x 4 =

5/6

Q6.Use what you know about place value to work out 180 x 4 =

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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

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

# Using arrays to multiply a 2 digit number by a 1 digit number

Are you a whizz at multiplying now? You might need a pencil and paper to help you choose the correct answer in this quiz.

Q1.Which is an example of partitioning?

1/6

Q2.Partitioning makes multiplying two digit numbers easier.

2/6

Q3.13 x 5 =

3/6

Q4.17 x 3 =

4/6

Q5.18 x 4 =

5/6

Q6.Use what you know about place value to work out 180 x 4 =

6/6

# Lesson summary: Using arrays to multiply a 2 digit number by a 1 digit number

## It looks like you have not completed one of the quizzes.

To share your results with your teacher please complete one of the quizzes.

## 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