Column subtraction with regrouping

What you'll learn

1. 1

   Imagine you have 32 sweets in a big bag. You want to give away 17 sweets.

2. 2

   Can you take 7 single sweets from 2 single sweets?

3. 3

   Here are 32 sweets in Dienes blocks. 3 tens and 2 ones. Watch what happens when we need to take 7 ones.

4. 4

   Let's do 32 − 17 together.

5. 5

   Now you try! Regroup and solve 43 − 26.

6. 6

   What is 43 − 26?

7. 7

   When you regroup, what do you swap?