Mathematician Hua once said: the universe is big, the particles are tiny, the speed of rockets, the cleverness of chemical engineering, the change of the earth, the complexity of daily use, and mathematics is everywhere. This is a wonderful description of the relationship between mathematics and life. "Mathematics Curriculum Standards" emphasizes the connection between mathematics and real life, requires "paying attention to learning and understanding mathematics from students' life experience and existing knowledge", and points out that "mathematics teaching must provide students with opportunities to observe and operate from familiar life scenes and interesting things, so that they can feel that mathematics is around them, feel the interest and function of mathematics, and have a strong interest in mathematics. "This strengthens the life and practicality of mathematics teaching. Therefore, in teaching, we must build a bridge between mathematics and life, not only to introduce life into the classroom to promote its "life", but also to let students bring mathematics into life to understand the mathematics in life, appreciate its value and promote its "mathematicization".