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.

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.

Keywords

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

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.