New
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.

New
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.

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## Lesson details

### Key learning points

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

### 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.

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).

## Starter quiz

### 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
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

### 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
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.
True
Q4.
Which equation matches the picture?
4 + 1 = 5
Correct answer: 1 + 4 = 5
5 - 1 = 4
Q5.
Which equation matches the story? First, there were 5 ducks in a pond. Then, 3 more ducks jumped in. Now, there are 8 ducks in the pond.
3 + 5 = 8
Correct answer: 5 + 3 = 8
8 - 5 = 3
Q6.
Laura has written this equation to match the picture. Is she correct? 5 + 3 = 8
Correct