Encourage your child to work on a new math addition worksheet everyday to keep adding skills fresh. Mix things up with basic addition worksheets and more challenging exercises, and even a few addition facts worksheets to keep your child engaged with the subject.
Children usually start to learn about decimals in Year 4. The first thing children need to know is that a decimal is A PART of a whole. A good way to explain this is to show them an empty hundred number square / chart.