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.
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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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.
