# Using derived facts to multiply mentally

Today we will use our knowledge of multiplying and dividing by 10, 100 and 1000 to derive facts from known facts. We will then use the distributive law and derived facts to multiply by choosing the most efficient and effective representations.

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!

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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!

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# 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.

Quiz:

# Using Derived Facts to Multiply Mentally Quiz

We covered a wide range of strategies for mental arithmetic during the lesson today which will allow you to be flexible and efficient when faced with different problems and tasks. Now it is time to put your knowledge to the test! Remember to read all questions carefully.

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Quiz:

# Using Derived Facts to Multiply Mentally Quiz

We covered a wide range of strategies for mental arithmetic during the lesson today which will allow you to be flexible and efficient when faced with different problems and tasks. Now it is time to put your knowledge to the test! Remember to read all questions carefully.

1/5

2/5

3/5

4/5

5/5