Year 2 - Maths
Add three addends
Calculating within 20
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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 add 3 addends. They will use a strategy such as finding 2 addends to total 10 or 2 numbers to bridge though 10.
Lesson Summary
You will learn to represent the addition of three addends.
Key Notes
- There can be three addends in an addition equation.
- We can represent this using a ten frame, a part-part-whole model or as an equation.
Vocabulary To Learn
- Addends: Any numbers that are added together.
- Represent: Showing something or standing for something.
Common Mistakes To Avoid
- Children may struggle to make the connection between the concrete, pictorial and abstract representations.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
There can be three addends in an addition equation. We can represent this using a ten frame, a part-part-whole model or as an equation.
2. Use this key word in a maths sentence and explain it clearly. 'Addends'
Any numbers that are added together. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children may struggle to make the connection between the concrete, pictorial and abstract representations. Correction: When using the part–part–whole representation, make sure you explicitly connect each number with what it represents. Ask the children to describe what they can see using the full stem sentences. 'The ___ represents the __________.'.
More Lessons In This Unit
- Add and subtract two numbers that bridge through 10 Study Guide
- Add three addends efficiently Study Guide
- Add three addends efficiently by finding two addends that total 10 Study Guide
- Add two numbers that bridge through 10 Study Guide
- Calculate the difference Study Guide
- Calculate the difference in different contexts Study Guide
- Calculate the difference when information is presented in a bar chart Study Guide
- Calculate the difference when information is presented in a pictogram Study Guide
- Compare the number of objects in two sets or difference between two measures. Study Guide
- Explain that the addends can be added in any order Study Guide
- Explain what the difference is between consecutive numbers Study Guide
- Use a 'First, then, then, now' story to add three addends Study Guide
- Use knowledge of calculating within 20 to solve problems Study Guide
- Use knowledge of calculating within 20 to solve problems involving statistics Study Guide
Browse all guides in the Year 2 Maths guide library.