Use efficient methods to solve subtraction equations
I can use efficient methods to solve subtraction equations.
Use efficient methods to solve subtraction equations
I can use efficient methods to solve subtraction equations.
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Lesson details
Key learning points
- Consecutive numbers always have a difference of 1
- If the whole and the known part in a subtraction equation are consecutive numbers, the missing part will always be 1
- If the known part in a subtraction equation is 1, the whole and the missing part will be consecutive numbers
- When the ones digits in the whole and the known part are the same, the missing part will be a multiple of 10
Keywords
Consecutive - Numbers which follow each other in order, without gaps.
Difference - The result of subtracting one number from another.
Whole - All of something; complete.
Part - A piece or section of a whole.
Common misconception
When writing equations with consecutive numbers, children may write in the order they are counted , e.g. 56-57 = forwards
Give missing number equations and represent them on part-part-whole models and bar models to consolidate understanding of which numbers in the equation represent the whole and the parts.
To help you plan your year 2 maths lesson on: Use efficient methods to solve subtraction equations, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Use efficient methods to solve subtraction equations, 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 1 maths lessons from the Addition and subtraction of two 2-digit numbers 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
19
52
48
Exit quiz
6 Questions
