Written methods of calculating in Year 3 As we like to concentrate on just one aspect of maths for each set of worksheets most of our calculation pages are found in the separate categories of addition, subtraction, multiplication and division. However, it is important that children can switch quickly from one to the other and this is where our ‘Four Rules’ category comes in. A complete mixture of all four, using written methods, can now be found for Year 3. Go to Year 3 Four Rules