Listening and Computing is a math exercise book. Listening and calculating books are mainly used to train students' listening and calculating ability. "Compulsory Education Mathematics Curriculum Standard" clearly stated that primary school students should be able to correctly perform four operations of integers, decimals and fractions, master some basic calculations, and gradually meet the requirements of reasonable and flexible calculation methods, that is, master some quick calculation skills and calculate correctly and flexibly while mastering basic oral calculation ability.