Math calculation expert of Xue Dian Primary School in Tongcheng: The fifth grade (Volume II) (Beijing Normal University Edition) is compiled according to the requirements of the new curriculum standard and the textbook of Beijing Normal University Edition, which is suitable for primary school students to use at the same time. Each exercise is basically consistent with the teaching progress of each grade, which avoids the phenomenon of advanced knowledge points, thus helping primary school students to improve their computing ability simultaneously.