The book of mathematical thought in Hongdu Primary School is very good. The Breakthrough of Red Bean's Mathematical Thinking is a math tutorial book suitable for primary school students. Through a large number of typical examples and exercises, students can learn and consolidate their mathematical knowledge and improve their mathematical thinking ability. The difficulty of this book is set reasonably, and gradually increases from easy to difficult, which is suitable for students of different levels. The content covers the common knowledge points of primary school mathematics learning, such as addition, subtraction, multiplication and division, fractions, decimals, graphics and so on. Keep students' interest and motivation in learning through games.