Use a 'First, then, then, now' story to add three addends

I can use a 'First, then, then, now' story to add three addends.

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Year 2

Use a 'First, then, then, now' story to add three addends

I can use a 'First, then, then, now' story to add three addends.

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Lesson details

Key learning points

A 'First … then … then … now' story can represent an addition with three addends.
The addition of three addends can be represented as three different objects on a ten frame.
The addition of three addends can be represented as three steps on a number line.
The addition of three addends can be represented as an equation.

Keywords

Addends - Any of the numbers that are added together.
First - Before anything else.
Then - After something in time.
Now - At the present time.

Common misconception

Children may not be able to accurately represent the story as an equation.

Ensure that children are able to say what each number represents in a given equation using the story as a scaffold before asking them to write their own equations to represent ‘First, then, then, now’ stories.

Represent augmentation on a number line, clearly demonstrating the two increases in quantity. This representation will prepare children for bridging through ten, covered later.

Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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6 Questions

Q1.

Look at the part-part-whole model. What is the missing part?

Correct Answer: 8

Q2.

Use number pairs to 10 to solve the equations.

Correct Answer:10 − 1 =,9

Correct Answer:10 − 5 =,5

Correct Answer:10 − 3 =,7

Correct Answer:10 − 6 =,4

Correct Answer:10 − 8 =,2

Q3.

This ten frame represents a story. First, there were 4 books on the shelf. Then, 2 more books were added to the shelf. Now, there are books on the shelf.

Correct Answer: 6

Q4.

Which equation represents this story? First, there were 7 stickers in my book. Then, I used 6 of the stickers. Now, there is 1 sticker left in my book.