Review using column subtraction with regrouping from hundreds to tens
I can use column subtraction, including regrouping from the hundreds to tens.
Review using column subtraction with regrouping from hundreds to tens
I can use column subtraction, including regrouping from the hundreds to tens.
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Lesson details
Key learning points
- Regroup when the ones or tens digit of the subtrahend is greater than the ones or tens digit of the minuend.
- Regroup a ten into 10 ones.
- Regroup a hundred into 10 tens.
- If the tens digit of the minuend is a zero, you need to regroup the hundreds before you can regroup the tens.
Keywords
Column subtraction - Column subtraction is a way of subtracting numbers by writing a number below another.
Regroup - The process of unitising and exchanging between place values is known as regrouping.
Common misconception
Pupils may not think regrouping is needed if the tens are the same digit, but regrouping in the ones can mean regrouping in the tens.
Share examples where regrouping 1 ten as 10 tens means that regrouping is also needed in the tens (e.g. 345 - 148).
To help you plan your year 4 maths lesson on: Review using column subtraction with regrouping from hundreds to tens, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 4 maths lesson on: Review using column subtraction with regrouping from hundreds to tens, download all teaching resources for free and adapt to suit your pupils' needs.
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Explore more key stage 2 maths lessons from the Review of column addition and subtraction unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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Starter quiz
6 Questions
Exit quiz
6 Questions
