# Use efficient strategies to multiply numbers, including decimals

In this lesson, we will evaluate what strategies are most efficient for various multiplication problems.

#### 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.If I know 7 x 5 = 35, what is 70 x 50?

1/5

Q2.If I know 8 x 7 = 56, what is 0.8 x 70?

2/5

Q3.In Mexico £1 is worth 25 Pesos. How many Pesos would you receive for £12?

3/5

Q4.In Brazil £1 is worth 6 Real. How much Real would you receive for £500?

4/5

Q5.In Japan £1 is worth 150 Yen. How much Yen would you receive for £50?

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.If I know 7 x 5 = 35, what is 70 x 50?

1/5

Q2.If I know 8 x 7 = 56, what is 0.8 x 70?

2/5

Q3.In Mexico £1 is worth 25 Pesos. How many Pesos would you receive for £12?

3/5

Q4.In Brazil £1 is worth 6 Real. How much Real would you receive for £500?

4/5

Q5.In Japan £1 is worth 150 Yen. How much Yen would you receive for £50?

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:

# Use efficient strategies to multiply numbers, including decimals

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

Q1.What is 675 x 7?

1/5

Q2.What is 455 x 9?

2/5

Q3.Find the product of 4.5 and 16

3/5

Q4.Find the product of 6.25 and 24

4/5

Q5.Oak travel are giving out refreshments to their guests on their plane, each guest receives 0.75 litres of water. There are 105 guests. How much water will they need?

5/5

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

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

# Use efficient strategies to multiply numbers, including decimals

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

Q1.What is 675 x 7?

1/5

Q2.What is 455 x 9?

2/5

Q3.Find the product of 4.5 and 16

3/5

Q4.Find the product of 6.25 and 24

4/5

Q5.Oak travel are giving out refreshments to their guests on their plane, each guest receives 0.75 litres of water. There are 105 guests. How much water will they need?

5/5

# Lesson summary: Use efficient strategies to multiply numbers, including decimals

## 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:
Dance