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).
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