Double 2-digit numbers and record as multiplications where one of the factors is 2
I can double 2-digit numbers and record as multiplications where one of the factors is 2
Double 2-digit numbers and record as multiplications where one of the factors is 2
I can double 2-digit numbers and record as multiplications where one of the factors is 2
Lesson details
Key learning points
- Doubles facts to 5 can help to double 2-digit numbers.
- To double, partition the 2-digit number, double the ones digit then the tens digit and recombine.
- Doubling can be written as a multiplication equation where one of the factors is 2
- When one of the factors is 2, the product is double the other factor.
Common misconception
Children may not be able to see doubling where the numbers cannot be seen e.g. money contexts.
Children should be encouraged to represent the numbers using resources to support them in visualising the problem until they are confident to use mental strategies to solve.
Keywords
Double/ Doubling - To become twice as many / to multiply by two.
Partition - The act of splitting an object or value down into smaller parts.
Factor - A factor is a number which exactly divides another whole number.
Product - A product is the result of two or more numbers multiplied together.
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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