# Exploring problems involving addition and subtraction

In this lesson, we will problem solve to complete missing number triangles! We will practice adding and subtracting to find the answers.

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.

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!

## Question 3

Q1.This part whole model can be expressed as 7 - 3 = 4. Choose the other subtraction equation that can be written from this part whole model.

1/3

Q2.There are five elves standing up, and two elves sitting down. Altogether, there are seven elves. This can be written as an equation: 5 + 2 = 7. How else can this equation be written?

2/3

Q3.This part whole model can be expressed as 1 + 6 = 7. Choose the other addition equation that can be written from this part whole model.

3/3

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.

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!

## Question 3

Q1.This part whole model can be expressed as 7 - 3 = 4. Choose the other subtraction equation that can be written from this part whole model.

1/3

Q2.There are five elves standing up, and two elves sitting down. Altogether, there are seven elves. This can be written as an equation: 5 + 2 = 7. How else can this equation be written?

2/3

Q3.This part whole model can be expressed as 1 + 6 = 7. Choose the other addition equation that can be written from this part whole model.

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"
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# 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.

# Lesson summary: Exploring problems involving addition and subtraction

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