Year 3 - Maths
Add three addends by finding pairs that total 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 recognise number pairs that total 10 and use them to find the sum of three numbers.
Key Notes
- Rearranging the addends identifies the pairs that total 10.
- Place value means we can add a single digit to 10.
- Representations help us to see the pair that makes 10 and the extra ones number.
Vocabulary To Learn
- addend: A number added to another.
- commutative: Addition is commutative. This means the order of the addends can be changed without changing the calculation or sum.
- equation: An equation is used to show that one number or calculation is equal to another.
- sum: The sum is the total when numbers are added together.
Common Mistakes To Avoid
- Pupils believe a pair to 10 only exists if the addends are next to one another in an equation.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Rearranging the addends identifies the pairs that total 10. Place value means we can add a single digit to 10.
2. Use this key word in a maths sentence and explain it clearly. 'addend'
A number added to another. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils believe a pair to 10 only exists if the addends are next to one another in an equation. Correction: Addition is commutative. Model the use of tens frames to show efficient addition of calculations containing number pairs to 10.
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 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 numbers that bridge through 10 Study Guide
- Subtracting small numbers Study Guide
- Subtracting to and from 10 Study Guide
Browse all guides in the Year 3 Maths guide library.