Use column addition with regrouping in ones and tens

I can use column addition with regrouping in the ones and tens.

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Year 3

Use column addition with regrouping in ones and tens

I can use column addition with regrouping in the ones and tens.

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Lesson details

Key learning points

When using column addition, start by adding the numbers with the smallest place value first.
Make sure that any regrouped 10s are added with the values in the tens column.
Make sure that any regrouped 100s are added with the values in the hundreds column.

Keywords

Column addition - Column addition is a way of adding 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 forget to refer to the size of the numbers when adding and when regrouping.

Encourage pupils to talk about the place value of the digits. Ten ones can be regrouped as a ten; ten tens can be regrouped as a hundred.

Pupils will need some familiarity regrouping ones and tens with column addition up to 3-digits. Sets of number cards (2-7) will be helpful for the second part of the lesson.

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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).