Year 1 - Maths
Find the difference between consecutive 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 recognise and use consecutive numbers.
Key Notes
- In a subtraction equation, when the subtrahend is one less than the minuend, all except one is subtracted.
- Numbers that are one more or one less than each other are called consecutive numbers.
- Consecutive numbers have a difference of one.
- Spotting consecutive numbers in subtraction equations can help us to solve equations more quickly.
Vocabulary To Learn
- Difference: The result of subtracting one number from another.
- One less: The number before a given number is one less than it.
- Consecutive: Numbers which follow each other in order, without gaps.
Common Mistakes To Avoid
- Children may resort to counting strategies to find the difference e.g. counting back four from five to solve 5 - 4
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
In a subtraction equation, when the subtrahend is one less than the minuend, all except one is subtracted. Numbers that are one more or one less than each other are called consecutive numbers.
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 to find the difference e.g. counting back four from five to solve 5 - 4. Correction: Always make a clear link between 'all except one' object leaving, and the subtrahend being one less than the minuend.
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
- Explain the difference between consecutive odd numbers Study Guide
- Find pairs of numbers that sum to 10 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.