1, covering a wide range. According to the mathematics textbooks of Shanghai primary schools, the Star of Jiaotong University arranges the training units and exercises of all grades, and designs knowledge and skills. The book is divided into four parts: synchronous classroom practice of oral arithmetic, oral arithmetic unit test, oral arithmetic competition test paper and reference answer.

2. the questions are rich. The questions of "Star of Jiaotong University" include pure equation questions, vertical questions, problem solving questions, chart questions and so on. The content is comprehensive, including mental arithmetic, clever calculation, simple arithmetic, estimation and oral calculation.