We use the Abacus scheme in school and follow the addition methods used in the scheme. The children learn to add mentally and also how to produce written methods for more complex calculations. Please look on this page for your child's year group to see the methods they will use during the year.
Mental addition using place value
Mental addition using partitioning
Adding near multiples of 100
Although these videos show written recording, the intention is that children will gain enough confidence to follow the process in their heads.
Adding near multiples of 1