Year 1 - Maths
Addition and subtraction within 10
Solving problems in a range of contexts
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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 have the opportunity to apply their knowledge of counting, comparing and number facts to solve problems in a range of contexts.
Lesson Summary
You will learn to use your knowledge of addition and subtraction within 10 when solving problems.
Key Notes
- Part + part = whole
- Whole − known part = unknown part
Vocabulary To Learn
- Part: A piece or section of the whole.
- Whole: All of a group or number.
- Unknown: An unknown is a quantity that has a set value but it is represented by a symbol or letter.
- Known: A given value.
Common Mistakes To Avoid
- Children may misrepresent a given problem meaning they are led to calculate the solution incorrectly.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Part + part = whole. Whole − known part = unknown part.
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 misrepresent a given problem meaning they are led to calculate the solution incorrectly. Correction: Children may identify the solution quickly when working with smaller numbers, but it is still important they are encouraged to visualise and represent each problem so that they know how to reveal the structure of the maths in more complex problems.
More Lessons In This Unit
Browse all guides in the Year 1 Maths guide library.