Applying number bonds within twenty to add and subtract

Today we are going to be adding and subtracting 2 digit numbers with regrouping by using our number bond knowledge

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 1

Question 2

Question 3

Question 4

Q1.If I know that 3 plus 4 is equal to 7, then I know 3 tens plus 4 tens is equal to 70.

1/4

Q2.'Counting in ones' is the most efficient way of counting

2/4

Q3.If I know that 6 = 4 + 2 and 5 = 3 + 2, then I can use these facts and say that 65 - 42 = 23.

3/4

Q4.'Counting all' is the most efficient way of counting

4/4

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 1

Question 2

Question 3

Question 4

Q1.If I know that 3 plus 4 is equal to 7, then I know 3 tens plus 4 tens is equal to 70.

1/4

Q2.'Counting in ones' is the most efficient way of counting

2/4

Q3.If I know that 6 = 4 + 2 and 5 = 3 + 2, then I can use these facts and say that 65 - 42 = 23.

3/4

Q4.'Counting all' is the most efficient way of counting

4/4

Video

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Worksheet

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Lesson summary: Applying number bonds within twenty to add and subtract

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