Explain how adjusting the minuend can make mental calculation easier
I can explain how adjusting the minuend can make mental calculation easier.
- Year 6
Explain how adjusting the minuend can make mental calculation easier
I can explain how adjusting the minuend can make mental calculation easier.
Lesson details
Key learning points
- If you increase the minuend the difference increases by the same amount.
- If you decrease the minuend the difference decreases by the same amount.
- Partitioning the minuend can simplify the calculation.
Keywords
Minuend - The minuend is the number being subtracted from.
Subtrahend - A subtrahend is a number subtracted from another.
Adjust - When you adjust you make a change to a number. This is done to make a calculation easier to solve mentally.
Inverse - The inverse is the opposite or reverse operation. For example, subtraction is the inverse operation of addition.
Common misconception
Pupils may be eager to use columnar written methods for larger integers and decimals instead of considering the values and using an efficient strategy.
Emphasise the importance of trying different mental methods so that pupils aren't reliant on written methods that prevent them from fully grasping the underlying structure of additive problems.
Licence
Lesson video
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