Year 3 - Maths
Subtracting numbers that bridge through 10
Review strategies for adding and subtracting across 10
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will be reviewing and securing previous knowledge of adding 3 addends, understanding they can be added in any order and combined in different ways to bridge through 10
Lesson Summary
You will learn to subtract through 10 using bridging.
Key Notes
- When the subtrahend is bigger than the ones value of the minuend, we will have to bridge through 10
- Composition of numbers to 10 allows us to partition numbers when we are subtracting.
- Composition of numbers to 10 allows us to bridge through ten when subtracting.
Vocabulary To Learn
- minuend: The minuend is the number being subtracted from.
- subtrahend: A subtrahend is a number subtracted from another.
- bridge: Bridge means subtracting to make 10 and then subtracting whatever is left.
- partition: Partition means splitting a number into smaller parts.
Common Mistakes To Avoid
- Pupils may incorrectly partition the subtrahend.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When the subtrahend is bigger than the ones value of the minuend, we will have to bridge through 10. Composition of numbers to 10 allows us to partition numbers when we are subtracting.
2. Use this key word in a maths sentence and explain it clearly. 'minuend'
The minuend is the number being subtracted from. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may incorrectly partition the subtrahend. Correction: Partition the subtrahend to count back to ten or a tens number. Use number pairs that total ten to help subtract whatever is left.
More Lessons In This Unit
- Add 3 numbers together in different contexts Study Guide
- Add 3 numbers together using doubles and near doubles Study Guide
- Add three addends by finding pairs that total 10 Study Guide
- Add three addends efficiently using a range of strategies Study Guide
- Addition by bridging through 10 Study Guide
- Numbers can be added in any order Study Guide
- Solving problems involving addition and subtraction Study Guide
- Subtracting small numbers Study Guide
- Subtracting to and from 10 Study Guide
Browse all guides in the Year 3 Maths guide library.