# Subtracting 2 digit numbers involving regrouping

In this lesson, we will learn how to subtract two digit numbers by using dienes cubes to represent our mental calculations.

#### 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.In the following equation, how can you partition the 4 in order to use the "Make 10" strategy? 61-4=57

1/3

Q2.Solve the following equation: 27-8=?

2/3

Q3.Solve the following equation: 53-6=?

3/3

#### 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.In the following equation, how can you partition the 4 in order to use the "Make 10" strategy? 61-4=57

1/3

Q2.Solve the following equation: 27-8=?

2/3

Q3.Solve the following equation: 53-6=?

3/3

# 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 2 digit numbers involving regrouping

This quiz will help you assess what you have learned in this lesson.

Q1.Solve the following equation mentally: 18-10=?

1/3

Q2.Solve the following by using a whole part model and the "Make 10" strategy. 32-15=?

2/3

Q3.Solve the following equation by using a whole part model and the "Make 10" strategy. 45-16=?

3/3

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

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

# Subtracting 2 digit numbers involving regrouping

This quiz will help you assess what you have learned in this lesson.

Q1.Solve the following equation mentally: 18-10=?

1/3

Q2.Solve the following by using a whole part model and the "Make 10" strategy. 32-15=?

2/3

Q3.Solve the following equation by using a whole part model and the "Make 10" strategy. 45-16=?

3/3

# Lesson summary: Subtracting 2 digit numbers involving regrouping

## 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