Year 2 - Maths
Use near 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 use near doubles within 10.
Key Notes
- We can use double facts to solve near-double calculations.
- We can double the smaller addend and add 1 If 4 + 4 = 8, then 4 + 5 is one more than 8, which is 9
- We can double the larger addend and subtract 1 If 5 + 5 = 10, then 4 + 5 is one less than 10, which is 9
Vocabulary To Learn
- Double/ Doubling: To become twice as many.
- Near-double: A near-double is a number close to a double.
Common Mistakes To Avoid
- Children could try to apply this idea to other near-double facts that may be more easily solved using other strategies.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
We can use double facts to solve near-double calculations. We can double the smaller addend and add 1 If 4 + 4 = 8, then 4 + 5 is one more than 8, which is 9.
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 could try to apply this idea to other near-double facts that may be more easily solved using other strategies. Correction: 0 + 1 and 1 + 2 are near-doubles, but these are more easily solved using the 'one more'/ 'one less' strategy. Explore this together before leading children to the most efficient strategy for calculating.
More Lessons In This Unit
Browse all guides in the Year 2 Maths guide library.