Year 1 - Maths
Find the missing part in an equation
Additive structures: addition
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Study Guides
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 find the missing part in an equation.
Key Notes
- Number sense and subitising skills can be used to help find missing parts.
- Patterns in the number system can be used to help find missing parts.
- Working systematically can help to spot number patterns.
Vocabulary To Learn
- Equation: Shows that one number or expression is equal to another.
- Part: Any numbers that can be added together to form a whole.
- Whole: The result of adding two or more parts.
Common Mistakes To Avoid
- Children may think the missing number in an equation always has to be the whole.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Number sense and subitising skills can be used to help find missing parts. Patterns in the number system can be used to help find missing parts.
2. Use this key word in a maths sentence and explain it clearly. 'Equation'
Shows that one number or expression is equal to another. 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 the missing number in an equation always has to be the whole. Correction: Encourage children to record their thinking, bringing attention to the missing part by underlining it.
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
- 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.