Pupils use strategies to make solving calculations more efficient
I can use strategies to make solving calculations more efficient.
Pupils use strategies to make solving calculations more efficient
I can use strategies to make solving calculations more efficient.
Lesson details
Key learning points
- Equivalent calculations can be used with the same difference or same sum to make calculations ‘easier’.
- A number line can be used to represent more efficient methods.
- Inverse, the relationship between addition and subtraction, can be used to solve missing number problems.
Common misconception
When using adjustment (e.g. 456 − 199), pupils may forget to subtract or add 1 to both parts.
The emphasis of same difference can encourage children to ensure they have subtracted or added to both parts of the calculation. Clearly display the visuals in this lesson to support with this.
Keywords
Efficient - Working efficiently means finding a way to solve a problem quickly whilst also maintaining accuracy.
Equivalent - Two or more things have the same value.
Inverse - The opposite in effect. The reverse of.
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).
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