《全日制义务教育数学课程标准》指出:学生的数学内容应当是现实的、有意义的、富有挑战性的,这些内容要有利于学生主动地进行观察、实验、猜测、验证、推理与交流等数学活动。也就是人们常说的在活动中学习数学。在生活、活动和游戏的情境中,容易诱发学生思维的积极性,引起学生更多的联想,容易激活学生已有的知识经验和解决问题的相关策略。创设良好有效的教学情境有多种方式,应针对不同年龄的学生以 Full-time compulsory education mathematics curriculum standard points out that the students ’mathematics content should be realistic, meaningful and challenging, which should be conducive to students’ initiative to observe, experiment, guess, verify, reason and exchange. Math activities. That is, people often say that in the activities of learning mathematics. In the context of life, activities and games, it is easy to arouse the enthusiasm of students thinking, causing students to associate more easily activate the existing knowledge and experience of students and related strategies to solve the problem. There are many ways to create a good and effective teaching situation, and it should be aimed at students of different ages