Year 4 - Maths
Use knowledge of column addition to solve problems in a range of contexts
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 column addition with regrouping to solve problems.
Key Notes
- Estimation gives you a value close to the correct answer.
- Start with the digits with the smallest place value so that regrouping can be represented.
- Look carefully at the ones number of the sum to find missing addends.
Vocabulary To Learn
- Estimate: Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved.
- Regroup: The process of unitising and exchanging between place values is known as regrouping.
Common Mistakes To Avoid
- Pupils may not make very accurate estimates for their calculations.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Estimation gives you a value close to the correct answer. Start with the digits with the smallest place value so that regrouping can be represented.
2. Use this key word in a maths sentence and explain it clearly. 'Estimate'
Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved. 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 not make very accurate estimates for their calculations. Correction: This lesson explores inaccurate estimations. Estimations should be quick and easy to calculate, but when adding two addends, it's sensible to make one larger and one smaller so that the estimate is as accurate as possible.
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
- Review using known facts and strategies to accurately and efficiently use and check column addition Study Guide
- Use column addition to solve problems in different contexts Study Guide
Browse all guides in the Year 4 Maths guide library.