Year 2 - Maths
Recall doubles within 10
Secure fluency of addition and subtraction facts within 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 revisit addition and subtraction within ten. They will consolidate addition and subtraction strategies.
Lesson Summary
You will learn to recall doubles within 10.
Key Notes
- When we double, we add two equal addends.
- When we halve, we subtract one of the equal amounts from its double.
- Halving is the inverse of doubling.
- If I know double 4 is 8, I know half of 8 is 4
Vocabulary To Learn
- Double / Doubling: To become twice as many.
- Half: One of two equal parts of a whole.
- Halving: To divide into two equal parts.
Common Mistakes To Avoid
- Children may struggle to see that a double is two of the same thing.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When we double, we add two equal addends. When we halve, we subtract one of the equal amounts from its double.
2. Use this key word in a maths sentence and explain it clearly. 'Double / Doubling'
To become twice as many. 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 see that a double is two of the same thing. Correction: Spend time exploring doubles that can be found in the children's immediate environment e.g. using their hands or playing a game of dominoes.
More Lessons In This Unit
Browse all guides in the Year 2 Maths guide library.