Add and subtract two numbers that bridge through 10
I can add and subtract using strategies to bridge 10
Add and subtract two numbers that bridge through 10
I can add and subtract using strategies to bridge 10
Lesson details
Key learning points
- Partition the addend so that you can make a number pair to 10
- The remaining part can be added to 10
- Partition the part being subtracted so that one of its smaller parts is equal to the ones digit.
- The remaining part can be subtracted from 10
- Bridging through 10 can be represented on a number line.
Common misconception
Children may make mistakes when adopting more mental strategies.
Leave scaffolds in place until showing confidence in verbal explanation. For example, once confident visualising 'making 10' using the ten frame, remove the scaffold of the ten frame and counters.
Keywords
Partition - The act of splitting an object or value down into smaller parts.
Whole - All of a group or number.
Part - A piece or section of the whole.
Bridging 10 - Addition or subtraction that crosses the 10 boundary.
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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Starter quiz
6 Questions
Exit quiz
6 Questions
4 + 1
3 + 2
2 + 3
1 + 4
