Solve equations involving the subtraction of two-digit numbers
I can solve equations involving the subtraction of two-digit numbers.
Solve equations involving the subtraction of two-digit numbers
I can solve equations involving the subtraction of two-digit numbers.
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Lesson details
Key learning points
- The known part can be partitioned into tens and ones before subtracting to help subtract two-digit numbers.
- Known facts and the partitioning of numbers can be used to help solve missing number equations.
Keywords
Partition - To split a whole up into parts - a piece or section of a whole.
Part - A piece or section of a whole.
Common misconception
Children may partition both the whole and the parts when subtracting two 2-digit numbers. They need to know to avoid this because it gives an incorrect answer when subtracting numbers which bridge 10
You may wish to explore further examples which do and do not reach the correct answer, articulating why this is the case and coming to the generalisation that, when subtracting, only one part needs to be partitioned into tens and ones.
To help you plan your year 2 maths lesson on: Solve equations involving the subtraction of two-digit numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Solve equations involving the subtraction of two-digit numbers, 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
The ones digit will change from 7 to 3
The tens digit will change from 7 to 3
47 − 30 − 2 = ?
47 − 3 − 20 = ?
47 − 5 − 30 = ?
Exit quiz
6 Questions
89 − 51
69 − 37
75 − 15
