Identify knowns and unknowns in addition equations
I can identify knowns and unknowns in addition equations.
Identify knowns and unknowns in addition equations
I can identify knowns and unknowns in addition equations.
Lesson details
Key learning points
- If the sum is missing, you add the addends.
- If an addend is missing, subtract the other addend from the sum to calculate the missing value.
- When the numbers are close together, add on to find the difference.
Common misconception
Pupils may confuse the parts and the whole in an equation, especially when there is a missing number.
Bar models are helpful for representing and understanding the parts and the whole. Ensure that pupils understand that minuend and sum both represent a whole. Allow lots of opportunities for pupils to sketch bar models.
Keywords
Addend - An addend is a number added to another.
Sum - The sum is the the total when numbers are added together.
Difference - The difference is the result after subtracting one number from another.
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
A number added to another.
The result after subtracting one number from another.
The total when numbers are added together.
