Use knowledge of the distributive law to calculate products using known times tables
I can use knowledge of the distributive law to calculate products using known times tables.
Use knowledge of the distributive law to calculate products using known times tables
I can use knowledge of the distributive law to calculate products using known times tables.
Lesson details
Key learning points
- If you know the 2 and 10 times tables you can work out the 12 times table.
- If you know the 10 times table you can work out the 9 times table.
- The distributive law allows you to add or subtract known times tables to work out new times table facts.
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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