Year 1 - Maths
Understand the relationship between addition and subtraction
Additive structures: addition
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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 combine 2 or more parts to make a whole. They will learn addends can be represented in any order and that the = sign shows the whole and sum of the parts are equal.
Lesson Summary
You will learn to represent both addition and subtraction and understand the link between them.
Key Notes
- In problems, if the whole and one part of the whole are known, subtraction can be used to find the missing part.
- This can be represented using a subtraction equation.
- In problems, if the parts are known, they can be combined using addition to find the whole.
- This can be represented using an addition equation.
Vocabulary To Learn
- Subtraction: To separate or take away one number from another, or to decrease an amount.
- Addition: To find the total, or sum, by combining two or more numbers (addends).
Common Mistakes To Avoid
- The terms minuend, subtrahend and difference may be difficult if only used occasionally.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
In problems, if the whole and one part of the whole are known, subtraction can be used to find the missing part. This can be represented using a subtraction equation.
2. Use this key word in a maths sentence and explain it clearly. 'Subtraction'
To separate or take away one number from another, or to decrease an amount. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: The terms minuend, subtrahend and difference may be difficult if only used occasionally. Correction: Ensure the terms are used by the teacher throughout lessons and encourage children to use them when explaining their thinking.
More Lessons In This Unit
- Add parts to find the value of the whole and write the equation Study Guide
- Combine parts using the addition symbol Study Guide
- Find the missing part in an equation Study Guide
- Partition a whole into two parts and write as a subtraction equation Study Guide
- Understand addition as increasing a quantity Study Guide
- Understand that parts can be represented in any order Study Guide
- Understand the use of the equals sign in equations Study Guide
- Understanding part-part-whole relationships Study Guide
- Using bar models to subtract Study Guide
Browse all guides in the Year 1 Maths guide library.