Year 1 - Maths
Add parts to find the value of the whole and write the equation
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 add parts to find the value of the whole and write the equation that represents this.
Key Notes
- In an equation, each addend represents a part.
- You can combine the addends to find the sum.
- To find how many objects there are altogether, you must count both addends.
Vocabulary To Learn
- Part: A piece or section of the whole.
- Whole: All of a group or number.
- Altogether: In total, the whole amount.
Common Mistakes To Avoid
- Children may have difficulty when the sum is presented on the left of the equal sign.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
In an equation, each addend represents a part. You can combine the addends to find the sum.
2. Use this key word in a maths sentence and explain it clearly. 'Part'
A piece or section 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 have difficulty when the sum is presented on the left of the equal sign. Correction: Ensure that equations are arranged with the sum both on the left and the right of equal sign. Use term 'is equal to' to stress equality.
More Lessons In This Unit
- 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 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.