MathsYears 3–4Addition & Subtraction

Add and subtract 3-digit numbers

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

What you'll learn

  1. 1

    Imagine you have 347 toy cars in a big box. You add 123 more — that's like putting two piles together!

  2. 2

    How many digits does the number 347 have?

  3. 3

    Build 347 by dragging hundreds, tens and ones blocks.

  4. 4

    Let's add 234 + 125 together.

  5. 5

    Now try 462 + 317 — build it with blocks.

  6. 6

    What is 300 + 400?

  7. 7

    What is 462 + 317?

Practise Add and subtract 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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