# Interpret and represent subtraction stories

I can interpret and represent subtraction stories that involve decreasing an amount using the ‘First, then, now’ structure.

# Interpret and represent subtraction stories

I can interpret and represent subtraction stories that involve decreasing an amount using the ‘First, then, now’ structure.

## Slide deck

## Lesson details

### Key learning points

- In a ‘First, then, now’ subtraction story, the number at the start of the story is decreased by subtracting a part.
- When using subtraction to decrease an amount, the number that is decreased must always be represented first.
- This can be represented with practical equipment and as a bar model or a number line.
- We can write an equation to match these representations.

### Common misconception

The change in amount during the 'then' part of the story may be hard to identify.

Draw attention to explicitly to the change, talking about it as a decrease.

### Keywords

First - Before anything else.

Then - After something in time.

Now - At the present time.

Decrease - To make something smaller in size or quantity.

### 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).

## Video

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## Worksheet

## Starter quiz

### 6 Questions

## Exit quiz

### 6 Questions

First, there were 2 dogs. Then, 2 dogs left. Now, there are 0 dogs.

First, there were 9 cats. Then, 1 cat left. Now, there are 8 cats.

First, there were 6 pigs. Then, 3 pigs left. Now, there are 3 pigs.