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Maths · Column addition worksheet

Column Addition Worksheet: Free Year 3 Maths with Answers

This free, printable worksheet helps children practise column addition with 3-digit numbers. The first four sums need no exchanging; the last four do, so children can build up step by step.

It prints on one A4 page, and the answers print on a second page for grown-ups.

Years 3–4 · ages 7–9KS2Free to printFree to shareSheet 96

What your child is learning

‘add and subtract numbers with up to 3 digits, using formal written methods of columnar addition and subtraction’

Year 3 Maths: Number – addition and subtraction, National Curriculum in England. Source and licence

Column Addition

Free Maths worksheet · Ages 7 to 8

Name:

A cartoon rabbit stacking wooden building blocks into towers, drawn as black outlines on white for colouring in.

Add the columns

Add the ones first, then the tens, then the hundreds. Exchange when you need to.

1.233+311
2.231+424
3.224+113
4.120+214
5.258+396
6.146+307
7.526+145
8.239+297

Answers: Column Addition

Sheet 96

1. 233 + 311 = 544
2. 231 + 424 = 655
3. 224 + 113 = 337
4. 120 + 214 = 334
5. 258 + 396 = 654
6. 146 + 307 = 453
7. 526 + 145 = 671
8. 239 + 297 = 536

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Answer key

1. 233 + 311 = 544
2. 231 + 424 = 655
3. 224 + 113 = 337
4. 120 + 214 = 334
5. 258 + 396 = 654
6. 146 + 307 = 453
7. 526 + 145 = 671
8. 239 + 297 = 536

How column addition works

Write the numbers one above the other so the ones, tens and hundreds line up. Add the ones column first, then the tens, then the hundreds. Starting on the right matters, because of exchanging.

What is exchanging?

When the ones add up to 10 or more, ten ones are exchanged for one ten. Children write the tens digit as a small number under the tens column and add it in. Many parents learned this as carrying; schools now usually call it exchanging.

How to help at home

Before your child starts, ask them to estimate. 368 plus 457 is about 400 plus 500, so the answer should be near 900. Afterwards, check an answer by taking one number away from it. These habits catch most slips.

Frequently asked questions

When do children learn column addition?

Formal written column addition with up to 3 digits is part of Year 3 maths in the National Curriculum in England, when children are 7 to 8. Year 4 moves on to 4-digit numbers.

Is carrying the same as exchanging?

Yes. Schools usually say exchanging because ten ones are swapped for one ten. The method is the same one many parents learned as carrying.

Is this worksheet really free?

Yes. Print it, save it as a PDF or share it with other parents and teachers. There is no sign-up and no email needed.

Curriculum links

Year 3 Maths: Number – addition and subtraction (statutory): 'add and subtract numbers with up to 3 digits, using formal written methods of columnar addition and subtraction'
Year 3 Maths: Number – addition and subtraction (statutory): 'estimate the answer to a calculation and use inverse operations to check answers'

Quoted word for word from Department for Education documents: the National Curriculum in England, the EYFS framework or the RSHE guidance. Contains public sector information licensed under the Open Government Licence v3.0.

Made by The Owee education team. Updated 13/10/2026. Free to print and share.