This simple book provides the opportunity for you and your child to have fun adding and developing your confidence and understanding of arithmetic. What is arithmetic KS1? Arithmetic is a type of Math which deals with the properties of numbers and manipulates them using the four operations. The four operations are addition, subtraction, multiplication and division. Take turns being the teacher asking the questions and answering the questions. Ask your child how did you know the answer? Which strategies did your child use to work out the answer? These questions are all simple to help your child become more confident reading and understanding number sentences.