Add and subtract two numbers that bridge through 10

I can add and subtract using strategies to bridge 10

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Year 2

Add and subtract two numbers that bridge through 10

I can add and subtract using strategies to bridge 10

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Share activities with pupils

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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.

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.

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.

At this stage in Year 2, children are likely to need lots of practise 'bridging 10' to become fluent. Children who grasp this quickly will benefit from the time to explore different ways to form an answer so they can think critically. They may also enjoy partitioning both addends into 5 + ___

Teacher tip

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).