Multiply a 2-digit number by a 1-digit number using expanded multiplication (no regroups)
I can represent partitioning in a column method for expanded multiplication.
Multiply a 2-digit number by a 1-digit number using expanded multiplication (no regroups)
I can represent partitioning in a column method for expanded multiplication.
Lesson details
Key learning points
- Knowledge of times tables and place value helps when multiplying 2-digit numbers.
- There are similarities between the representations of multiplication.
- Arranging the factors in columns allows you to organise the partial products into a column addition.
Keywords
Expanded multiplication - A way of recording the steps of a calculation focusing on partitioning one or more factors and showing partial products.
Partial product - Any of the multiplication results that lead up to an overall multiplication result.
Common misconception
When using the expanded method, pupils may not align the digits correctly with the same place value.
Use clear teacher modelling and continue to ask what each digit that has been recorded represents and link back to the place value chart.
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).
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