Maths: Subtraction – Column Subtraction

In this tutorial, learn how to use columns to subtract numbers. Subtraction is the calculation used to take away, or find the difference between one number and another.

In some column subtractions, we need to exchange across the place value columns. We'll show you what this means with a step-by-step example.

This rhyme can help you remember when to exchange:

More on top? Don't stop!
Are the numbers the same? Zero's the game!
More on the floor? Pop next door and get 10 more!