Year 4 - Maths
Review using known facts and strategies to accurately and efficiently use and check column addition
Review of column addition and subtraction
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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 revisit column addition with regrouping and column subtraction with exchanging to solve problems.
Lesson Summary
You will learn to use known facts and strategies to efficiently calculate and check column addition.
Key Notes
- Look carefully at the numbers in a calculation. Is column addition the most efficient method to use to find the sum?
- Use strategies to help you check your calculations.
- Estimate the answer first to improve your accuracy.
Vocabulary To Learn
- Efficient: Being efficient means finding a way to solve a problem quickly whilst also maintaining accuracy.
- Estimation: Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved.
- Regrouping: The process of unitising and exchanging between place values is known as regrouping.
Common Mistakes To Avoid
- Pupils may struggle to use estimation to help them with checking addition equations.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Look carefully at the numbers in a calculation. Is column addition the most efficient method to use to find the sum? Use strategies to help you check your calculations.
2. Use this key word in a maths sentence and explain it clearly. 'Efficient'
Being efficient 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 struggle to use estimation to help them with checking addition equations. Correction: Encourage pupils to find the nearest multiple of 10 or 100 to the numbers they are adding. They will not yet be familiar with 'rounding'. Estimated answers do not need to be really accurate, then are just an approximation and help when checking.
More Lessons In This Unit
- Decide on the most efficient subtraction strategy, including column subtraction Study Guide
- Review adding 2-digit numbers using column addition without regrouping Study Guide
- Review adding 3-digit numbers using column addition without regrouping Study Guide
- Review and use knowledge of place value to correctly lay out column addition Study Guide
- Review column addition and identify the addends and sum Study Guide
- Review identifying the minuend and subtrahend in column subtraction Study Guide
- Review using column addition to add 2- and 3-digit numbers by regrouping ones Study Guide
- Review using column addition to add 2- and 3-digit numbers by regrouping tens Study Guide
- Review using column addition with regrouping in the ones and tens columns Study Guide
- Review using column subtraction to subtract without regrouping Study Guide
- Review using column subtraction with regrouping from hundreds to tens Study Guide
- Review using column subtraction with regrouping from tens to ones Study Guide
- Use column addition to solve problems in different contexts Study Guide
- Use knowledge of column addition to solve problems in a range of contexts Study Guide
Browse all guides in the Year 4 Maths guide library.