New
New
Year 2
Add and subtract two numbers that bridge through 10
I can add and subtract using strategies to bridge 10
New
New
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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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).Lesson video
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Starter quiz
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6 Questions
Q1.
What expression does this image show? 7 +
Q2.
This image shows 6 + 8. How should the 8 be partitioned?
Partition 8 into 6 and 2
Partition 8 into 5 and 3
Q3.
Look at this inequality. 2 + 4 + 6 10 Which symbol is missing? < > or =
<
=
Q4.
Which representation shows 6 + 7?
Q5.
How can 5 be partitioned to help make 10?
Partition 5 into 1 and 4
Partition 5 into 5 and 0
Q6.
Partition 5 in this equation to find the sum. 8 + 5 =
Exit quiz
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6 Questions
Q1.
Andeep has the equation 9 + 6 = ___ How has he partitioned 6 to be able to bridge through 10?
6 was partitioned into 3 and 3
6 was partitioned into 10 and 5
Q2.
7 + 5 = 12 How has Laura shown bridging through 10?
7 + 10 + 12
7 + 5
Q3.
When solving 7 + 4 = ? which expression shows that the second addend has been partitioned correctly to bridge 10?
7 + 1 + 3
7 + 2 + 2
Q4.
How should 5 be partitioned in each expression to bridge through 10?
4 + 1
3 + 2
2 + 3
1 + 4
Q5.
How should 5 be partitioned to bridge 10?
Partition 5 into 1 and 4
Partition 5 into 2 and 3
Partition 5 into 4 and 1
Q6.
14 − 6 = 8 How would the 6 have been partitioned to bridge 10?
6 was partitioned into 5 and 1
6 was partitioned into 3 and 3