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Year 1

Understand addition as increasing a quantity

I can describe addition stories which involve increasing an amount and write equations to represent them.

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New

Year 1

Understand addition as increasing a quantity

I can describe addition stories which involve increasing an amount and write equations to represent them.

Download all resources

Share activities with pupils

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Lesson details

Key learning points

Addition can involve increasing a quantity.
Using ‘First, then, now’ stories can be useful when representing and understanding addition as an increase in quantity.

Keywords

First - Coming before all others in time or order; earliest.
Then - At that time.
Now - At the present time.
Increase - To make something larger/greater in size or quantity.

Common misconception

Children may write the addends in any order when representing addition as an increase in quantity.

Present and discuss errors, focusing on what each number in an equation represents.

Focus particularly on the plus sign signifying an increase in size in this context. Ask children to explain relationships between the practical, pictorial contexts and abstract and to justify decisions when matching these to each other.

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).

Lesson video

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Worksheet

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Starter quiz

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6 Questions

Q1.

Tick an addition equation that could represent the counters.

5 + 9 = 4

Correct answer: 4 + 5 = 9

9 - 4 = 5

Q2.

Tick two subtraction equations that could represent the counters.

5 + 4 = 9

4 - 5 = 9

Correct answer: 9 - 4 = 5

Correct answer: 9 - 5 = 4

Q3.

Izzy writes this subtraction equation to represent the bar model. 9 – 2 = ? Which addition equation could also be represented by the bar model?

9 - ? = 2

2 + 9 = ?

Correct answer: 2 + ? = 9

Q4.

Which set of counters could represent this story? There were 2 large teddies and 4 small teddies. How many teddies were there altogether?

Correct Answer: An image in a quiz

Q5.

Tick the two equations which could be represented by this bar model.

9 + 6 = 3

Correct answer: 9 - 3 = 6

6 - 3 = 9

Correct answer: 3 + 6 = 9

Q6.

Which of these is not an addition story?

Correct answer: I have 5 pennies in my pockets. 2 are in one. How many are in the other?

Jun has 3 pennies, Izzy has 2. How many pennies do they have altogether?

I have 3 pennies in one pocket and 2 in the other. How many pennies altogether?

Exit quiz

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6 Questions

Q1.

Alex writes an equation to match this story. 2 + 1 = 3 What does the 3 represent?

The birds at the start of the story

The birds that were added

Correct answer: The birds at the end of the story

Q2.

Which story matches the picture?

Correct answer: First, there were 2 children on the mat. Then, 3 joined. Now, there are 5.

First, there were 5 children on the mat. Then, 3 joined. Now, there are 2.

First, there were 3 children on the mat. Then, 2 joined. Now, there are 5.

Q3.

True or false. The counters shown represent this story. First, there were 4 cakes on the table. Then, my friend put 3 more cakes on the table. Now, there are 7 cakes on the table.