# Subtracting multiples of 10 from 3-digit numbers

In this lesson, we will use known number facts in order to mentally subtract multiples of 10 from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental subtraction more efficient.

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

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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!

Q1.Which one of these is a 3 digit number?

1/5

Q2.674 + 20 =

2/5

Q3.654 + 30 = 694 True or false?

3/5

Q4.520 + 80 =

4/5

Q5.666 + 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.Which one of these is a 3 digit number?

1/5

Q2.674 + 20 =

2/5

Q3.654 + 30 = 694 True or false?

3/5

Q4.520 + 80 =

4/5

Q5.666 + 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:

# Subtracting Multiples of 10 from 3-Digit Numbers Quiz

Let's see how much you have learnt about subtracting multiples of 10 from 3-digit numbers

Q1.When we subtract the number we started with gets...

1/5

Q2.356 - 40 = 326 True or false?

2/5

Q3.673 - 60 =

3/5

Q4.532 - 40 =

4/5

Q5.300 - 60 =

5/5

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

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

# Subtracting Multiples of 10 from 3-Digit Numbers Quiz

Let's see how much you have learnt about subtracting multiples of 10 from 3-digit numbers

Q1.When we subtract the number we started with gets...

1/5

Q2.356 - 40 = 326 True or false?

2/5

Q3.673 - 60 =

3/5

Q4.532 - 40 =

4/5

Q5.300 - 60 =

5/5

# Lesson summary: Subtracting multiples of 10 from 3-digit numbers

## 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