Yes According to the information about mathematics in the first volume of the third grade of Beijing Normal University, the mathematics in the first volume of the third grade of Beijing Normal University is sometimes divided into minutes and seconds. The first volume of the third grade mathematics textbook published by Beijing Normal University was published on 20 16. The primary school textbooks published by Beijing Normal University Press are used by primary schools in some provinces and cities such as Guangxi, Yunnan and Guizhou.