Year 3 - Maths
Solve one and two-step problems in different contexts
Understand additive relationships and apply them to rearrange equations
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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 accurately and efficiently solve multi-step addition and subtraction problems. They will understand and explain how both addition and subtraction equations can be used to describe the same additive relationship.
Lesson Summary
You will learn to solve one and two-step problems in different contexts.
Key Notes
- When a part is missing, subtract the other part from the whole.
- When the whole is missing, add the parts together.
- Look for the strategy which is most efficient.
Vocabulary To Learn
- Efficient: Working efficiently means finding a way to solve a problem quickly whilst also maintaining accuracy.
Common Mistakes To Avoid
- Pupils may try to solve problems without thinking about the numbers involved.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When a part is missing, subtract the other part from the whole. When the whole is missing, add the parts together.
2. Use this key word in a maths sentence and explain it clearly. 'Efficient'
Working efficiently means finding a way to solve a problem quickly whilst also maintaining accuracy. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may try to solve problems without thinking about the numbers involved. Correction: Encourage pupils to look at the calculations and think about the numbers involved. Pupils may not get the most efficient method first time so encourage them to think about their responses and learn from what other children have done.
More Lessons In This Unit
- Develop understanding of the relationship between addition and subtraction Study Guide
- Identify knowns and unknowns in addition equations Study Guide
- Identify knowns and unknowns in subtraction equations Study Guide
- Solve multi-step addition and subtraction problems efficiently Study Guide
- Solve problems using bar charts, pictograms and tables Study Guide
- Understand why the order of addition and subtraction steps can be chosen Study Guide
- Use the additive relationship to rearrange addition equations Study Guide
- Use the additive relationship to rearrange and solve equations Study Guide
- Use the additive relationship to rearrange subtraction equations Study Guide
Browse all guides in the Year 3 Maths guide library.