Add and subtract mentally without bridging a boundary
I can add and subtract mentally without bridging a boundary with one or more digits changing
Add and subtract mentally without bridging a boundary
I can add and subtract mentally without bridging a boundary with one or more digits changing
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Lesson details
Key learning points
- Known facts to 10 can be applied when adding and subtracting 100s, 1,000s, 10,000s and 100,000s
- When adding and subtracting mentally, the language of unitising supports us in addition to using known facts.
- An understanding of the structure of numbers and place value supports when we add and subtract mentally.
Keywords
Addend - An addend is a number added to another. They are also known as the parts.
Common misconception
Children may believe that only one digit will change when adding two numbers where one addend has only one non-zero digit.
This is usually correct but what would happen if the digit changed to a value of 10 or greater? Then we would need to regroup (another lesson).
To help you plan your year 6 maths lesson on: Add and subtract mentally without bridging a boundary, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 6 maths lesson on: Add and subtract mentally without bridging a boundary, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 2 maths lessons from the Order, compare and calculate with numbers up to 8 digits unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
6,451,038
4,651,038
4,471,038
4,453,038
4,451,238
8,265,792
8,265,292
8,265,272
8,265,268