Divide a 2-digit by a 1-digit number using partitioning (with regrouping)

I can divide a 2-digit by a 1-digit number using partitioning and representations (with regrouping).

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Year 5

Divide a 2-digit by a 1-digit number using partitioning (with regrouping)

I can divide a 2-digit by a 1-digit number using partitioning and representations (with regrouping).

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Share activities with pupils

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Lesson details

Key learning points

Partitioning the dividend into tens and ones helps when dividing a 2-digit by a 1-digit number.
If the dividend is not a multiple of the divisor, there will be a remainder.
If the remainder is a number of tens, you can regroup the tens for ones and continue to divide.

Common misconception

Pupils not being able to regroup when dividing.

Use concrete resources to highlight regrouping of tens. Ask children 'What is the highest multiple you know?' to support with partitioning.

Keywords

Remainder - An amount left over after division.
Partition / partitioning - Splitting a number into smaller parts.
Regroup / regrouping - The process of unitising and exchanging between place values.

Draw special attention to the '10s' digit and ask children if that is a multiple of the divisor. Children are to understand the generalisation '10s' digit in the dividend is not a multiple of the divisor, they will have to regroup.

Teacher tip

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).