Year 1 - Maths
Combine parts using the addition symbol
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 partition a whole in different ways and use an addition symbol when recombining them.
Key Notes
- When a whole is partitioned into parts, it can be represented using the addition symbol.
- The addition symbol shows that the parts combine to make the whole.
- We can describe the parts to help us understand how to represent them.
- A whole group can be partitioned in different ways.
Vocabulary To Learn
- Partition: To split a whole up / to separate a whole into parts.
- Parts: A piece or section of a whole.
- Whole: All of something. Complete.
- Plus: Another word for add. The symbol is +.
- Combine: To put parts together to make a whole.
Common Mistakes To Avoid
- Children may have difficulty understanding partitioning of the whole group where one part is zero.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When a whole is partitioned into parts, it can be represented using the addition symbol. The addition symbol shows that the parts combine to make the whole.
2. Use this key word in a maths sentence and explain it clearly. 'Partition'
To split a whole up / to separate a whole into parts. 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 have difficulty understanding partitioning of the whole group where one part is zero. Correction: Include contexts with zero, so children can discuss and clarify their thinking.
More Lessons In This Unit
- Add parts to find the value of the whole and write the equation 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 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.