# Use knowledge of the distributive law to calculate products beyond known times tables

I can use knowledge of the distributive law to calculate products beyond known times tables efficiently.

# Use knowledge of the distributive law to calculate products beyond known times tables

I can use knowledge of the distributive law to calculate products beyond known times tables efficiently.

## Lesson details

### Key learning points

- If you know the 3 and 10 times tables you can work out the 13 times table.
- If you know the 10 times table you can work out the 20 times table.
- If you know the 5 and 8 times tables you can work out the 16 times table.

### Common misconception

Pupils may think that there is only one strategy for finding a solution and struggle to see that there is more than one way of partitioning a factor.

Spend some time discussing how many combinations of partitioned factor you could use with the distributive law and evaluate each combination for efficiency. This would be a worthwhile guided group task.

### Keywords

Partition - Partitioning is the act of splitting an object or value down into smaller parts.

Distributive law - The distributive law says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately.

Partial product - A partial product is any of the multiplication results we get leading up to an overall multiplication result.

### 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).

## Video

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