Year 3 - Maths
Use place value to correctly lay out 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 place value to lay out column addition correctly.
Key Notes
- The addends are written with the same value digits in the same column
- The sum is recorded underneath with the same value digits in the same column
- Zero is used to show that there are no 100s, 10s or 1s
Vocabulary To Learn
- addend: An addend is a number added to another.
- column addition: Column addition is a way of adding numbers by writing a number below another.
Common Mistakes To Avoid
- Pupils may forget to use zero to show that there are no 10s or 1s (e.g. in 60), or may use zero to show that there are no 100s when it is not needed (e.g. they may write 068).
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
The addends are written with the same value digits in the same column. The sum is recorded underneath with the same value digits in the same column.
2. Use this key word in a maths sentence and explain it clearly. 'addend'
An addend is a number added to another. 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 forget to use zero to show that there are no 10s or 1s (e.g. in 60), or may use zero to show that there are no 100s when it is not needed (e.g. they may write 068). Correction: Explain to pupils that zero is needed to show that there are no 10s or 1s in a 3-digit number although it isn't needed to show that there are no 100s. We don't write 68 as 068, so we do not do this with column addition either.
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 known facts and strategies to accurately and efficiently calculate and check column addition Study Guide
Browse all guides in the Year 3 Maths guide library.