Year 1 - Maths
Explain the difference between consecutive odd numbers
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 explain that addition is commutative. They will find pairs of numbers to 10 and add or subtract 1 from any number. Pupils will also develop their knowledge and understanding of odd and even numbers and that even numbers relate to doubling and halving.
Lesson Summary
You will learn to explain the difference between consecutive odd numbers.
Key Notes
- Consecutive odd numbers have a difference of 2
- We can use this knowledge to solve missing number problems when 2 is the known part.
Vocabulary To Learn
- Difference: The result of subtracting one number from another.
- Odd: Any integer (not a fraction) that cannot be divided exactly by 2
- Consecutive: Numbers which follow each other in order, without gaps, from smallest to largest.
Common Mistakes To Avoid
- Children may resort to counting strategies without noticing that the relationship between the minuend and the subtrahend is that there is a difference of two.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Consecutive odd numbers have a difference of 2. We can use this knowledge to solve missing number problems when 2 is the known part.
2. Use this key word in a maths sentence and explain it clearly. 'Difference'
The result of subtracting one number from another. 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 resort to counting strategies without noticing that the relationship between the minuend and the subtrahend is that there is a difference of two. Correction: Draw out the patterns that will allow children to solve these equations without needing to using counting strategies. For example, 5 + 2 and 2 + 5 are 'odd number after'; 7 - 2 is 'odd number before' and 7 - 5 is 'difference of two'.
More Lessons In This Unit
- Add and subtract one from any number Study Guide
- Add and subtract two from even numbers within 10 Study Guide
- Add and subtract two from odd numbers within 10 Study Guide
- Addition and subtraction facts within 10 Study Guide
- Addition and subtraction involving zero Study Guide
- Double numbers and explain what doubling means Study Guide
- Explain that addition is commutative Study Guide
- Explain the difference between consecutive even numbers Study Guide
- Find pairs of numbers that sum to 10 Study Guide
- Find the difference between consecutive numbers Study Guide
- Halve numbers and explain what halving means Study Guide
- Solve problems by adding 3 to 5 and 6 Study Guide
- Use knowledge of doubles to calculate near-doubles Study Guide
- Use number pairs to 10 in subtraction contexts Study Guide
Browse all guides in the Year 1 Maths guide library.