Year 3 - Maths
Use known facts and strategies to accurately and efficiently calculate and check column addition
Column addition
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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 identify the addends and the sum in column addition. They will use their knowledge of place value to correctly lay out column addition.
Lesson Summary
You will learn to use known facts and strategies to efficiently calculate and check column addition.
Key Notes
- Consider each calculation to see whether column addition is the most efficient method to use.
- Use strategies to help check calculations.
- Use estimation to give a value close to the correct answer.
Vocabulary To Learn
- Efficient: Being efficient means finding a way to solve a problem quickly whilst also maintaining accuracy.
- 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 struggle with estimation, especially with thinking of numbers that are quick and easy to calculate with.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Consider each calculation to see whether column addition is the most efficient method to use. Use strategies to help check 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 with estimation, especially with thinking of numbers that are quick and easy to calculate with. Correction: Pupils will probably have little or no experience of rounding but they will be able to think about the place value of numbers and give tens or hundreds numbers that are close. Number lines may be helpful for some children.
More Lessons In This Unit
- Add 2-digit numbers using column addition Study Guide
- Add 3-digit numbers using column addition Study Guide
- Identify the addends and the sum in column addition Study Guide
- Use column addition to add numbers by regrouping ones Study Guide
- Use column addition to add numbers by regrouping tens Study Guide
- Use column addition to solve problems Study Guide
- Use column addition with regrouping in ones and tens Study Guide
- Use column addition with regrouping to solve problems Study Guide
- Use place value to correctly lay out column addition Study Guide
Browse all guides in the Year 3 Maths guide library.