Year 1 - Maths
Addition and subtraction involving zero
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 add and subtract zero and know when the difference is zero.
Key Notes
- When zero is added to a number the number, the number does not change.
- When zero is subtracted from a number, the number does not change.
- Subtracting a number from itself gives a difference of zero.
Vocabulary To Learn
- Zero: Zero is the number that represents no amount or objects. When we add zero to a number, the result is just the number, unchanged.
- Add: To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.
- Subtract: To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.
- Same: The equal sign is used to show that the values on either side of it are the same.
Common Mistakes To Avoid
- Children may think that adding or subtracting zero gives zero. For example, 6 + 0 = 0 or 4 - 0 = 0
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When zero is added to a number the number, the number does not change. When zero is subtracted from a number, the number does not change.
2. Use this key word in a maths sentence and explain it clearly. 'Zero'
Zero is the number that represents no amount or objects. When we add zero to a number, the result is just the number, unchanged. 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 think that adding or subtracting zero gives zero. For example, 6 + 0 = 0 or 4 - 0 = 0. Correction: Use manipulatives to help children see that adding or subtracting zero will not change the starting amount. Model this alongside the written equation so that they can see what each part is representing.
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
- 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
- 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.