Column subtraction in Year 3
As well as column addition, children have also been taught how to subtract using formal methods too.
We pretend to hold the numbers in the top row as jelly babies in our hand, then we subtract the number below.
We also nickname the exchanges that are needed smash and grab, as a way to remember this method.
The giant equals sign at the bottom shows where our answers are recorded.
Again, ask your child to show you how to do this. We have all worked in this way in class!