Adding and subtracting whole numbers

What you'll learn

1. 1

   Imagine you have £45 in your wallet and your mate gives you £27. You want to know the total.

2. 2

   When you add 45 and 27, which digits do you add first?

3. 3

   Use the number line to add 45 + 27. Start at 45 and jump forward 20, then 7 more.

4. 4

   Let's do 45 + 27 together, step by step.

5. 5

   Now try 63 - 28. What's the first step?

6. 6

   Use place value blocks to subtract 28 from 63. You'll need to exchange a ten for 10 ones.

7. 7

   What is 63 - 28?