Adding two 2-digit numbers

In this lesson we will be identifying which known number bonds will help us to add two 2-digit numbers and use known facts to derive new addition facts.

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 1

Question 2

Question 3

Question 4

Question 5

Q1.If 2 + 3 = 5 then 20 + 30 = _____

1/5

Q2.If I know that 6 - 2 - 3 = 1 then 60 - 20 - 30 = ____

2/5

Q3.What is 40 - 30?

3/5

Q4.What is 67 - 20?

4/5

Q5.Seventy Two subtract Thirty is equal to ______

5/5

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 1

Question 2

Question 3

Question 4

Question 5

Q1.If 2 + 3 = 5 then 20 + 30 = _____

1/5

Q2.If I know that 6 - 2 - 3 = 1 then 60 - 20 - 30 = ____

2/5

Q3.What is 40 - 30?

3/5

Q4.What is 67 - 20?

4/5

Q5.Seventy Two subtract Thirty is equal to ______

5/5

Video

Play 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:

Adding two 2-digit numbers

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

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.If 3 + 6 = 9 then 39 + 60 = ______

1/5

Q2.Which TWO number facts help us to solve 24 + 35?

Select two (2) boxes

2/5

Q3.Which TWO number facts help us to solve 17 + 52?

Select two (2) boxes

3/5

Q4.Which TWO number facts help us to solve 23 + 54?

Select two (2) boxes

4/5

Q5.What is 63 + 12?

5/5

Quiz:

Adding two 2-digit numbers

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

Question 1

Question 2

Question 3

Question 4

Question 5

Q1.If 3 + 6 = 9 then 39 + 60 = ______

1/5

Q2.Which TWO number facts help us to solve 24 + 35?

Select two (2) boxes

2/5

Q3.Which TWO number facts help us to solve 17 + 52?

Select two (2) boxes

3/5

Q4.Which TWO number facts help us to solve 23 + 54?

Select two (2) boxes

4/5

Q5.What is 63 + 12?

5/5

Lesson summary: Adding two 2-digit numbers

It looks like you have not attempted both the quizzes.

To share your results with your teacher please complete both the quizzes.