Adding two 2-digit numbers

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

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.

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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.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

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.

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.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

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Worksheet

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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.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

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

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.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

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

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