Year 1 - Maths
Understand that parts can be represented in any order
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 know that parts can be combined in any order and can represent this.
Key Notes
- When parts of a whole are added together, each part is called an addend.
- You can combine the parts in any order because they still make the same whole.
- You can write the addends in any order because, when combined, they still make the same whole.
Vocabulary To Learn
- Partition: To split a whole up into parts (pieces or sections of the whole).
- Combine: To put parts together to make a whole.
Common Mistakes To Avoid
- Children may believe that addends must be represented in a certain order.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When parts of a whole are added together, each part is called an addend. You can combine the parts in any order because they still make the same whole.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
To split a whole up into parts (pieces or sections of the whole). 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 believe that addends must be represented in a certain order. Correction: Ensure parts are seen alongside objects and pictures presented in different ways so the visual always matches the given expression.
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 the relationship between addition and subtraction 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.