Use knowledge of doubles to calculate near-doubles
I can use knowledge of doubles to calculate near-doubles.
Use knowledge of doubles to calculate near-doubles
I can use knowledge of doubles to calculate near-doubles.
Lesson details
Key learning points
- Knowing double facts helps you to calculate near-doubles.
- If 2 + 2 is equal to 4, then 2 + 3 is equal to one more than 4 which is 5
Common misconception
Children could try to apply this idea to other near-double facts that may be more easily solved using other strategies.
0 + 1 and 1 + 2 are near-doubles, but these are more easily solved using the 'one more'/ 'one less' strategy. Explore this together before leading children to the most efficient strategy for calculating.
Keywords
Double - To become twice as many.
Near-double - A near-double is a number close to a double.
Addends - Any of the numbers that are added 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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