MathsYears 3–4Addition & Subtraction

Column addition (3-digit numbers)

Add numbers with up to 3 digits using formal written method of columnar addition

What you'll learn

  1. 1

    Imagine you have 246 sweets and your friend gives you 138 more. That's a LOT of sweets! 🍬

  2. 2

    When we stack numbers for column addition, what goes under what?

  3. 3

    Build 246 by dragging hundreds, tens and ones blocks.

  4. 4

    Let's add 246 + 138 together.

  5. 5

    Now try 327 + 256 — build it with blocks and add.

  6. 6

    What is 7 + 8? (You'll need to carry!)

  7. 7

    What is 246 + 138?

Practise Column addition (3-digit numbers) with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 7–9. Aligned to the UK National Curriculum.

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