The Primary National Curriculum expects children to learn and accurately use formal written methods for the four operations (addition, subtraction, multiplication and division). These are the end of year expectations for each year group:
At Abbotswood, we have identified a progressive approach to teaching the formal written methods so that children understand how and why we use each method. Our progression in written methods for each operation can be found here:

Ask your child's Maths teacher which stage they are currently working on for each written method so you can practise with them at home.
These videos explain how we teach each formal written method so that you can support your child at home.