Explain how adjusting the subtrahend affects the difference: reduction structure
I can explain how adjusting the subtrahend affects the difference in a reduction structure.
Explain how adjusting the subtrahend affects the difference: reduction structure
I can explain how adjusting the subtrahend affects the difference in a reduction structure.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- The more you subtract the less you are left with.
- The less you subtract the more you are left with.
- A number line can be used to represent the change in the subtrahend.
Keywords
Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another.
Difference - The difference is the result after subtracting one number from another.
Adjust - When you adjust you make a change to a number. This is done to make a calculation easier to solve mentally.
Common misconception
Pupils might think that if the subtrahend increases or decreases then so too does the difference. They might find it initially difficult to understand the idea of the inverse in the context.
Give lots of practical examples of this such as emptying out bottles or eating sweets demonstrating an increase in the subtrahend and its effect on the difference.
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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Starter quiz
6 Questions
