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《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。《标准》还指出:为了使学生经历应用数学的过程,教学应采取“问题情境——建立模型——解释、应用与拓展”的过程。数学情境是学生掌握知识、形成能力、发展心理品质的重要源泉,是沟通现实生活与数学学习、具体问题与抽象概
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. The Standard also points out that in order for students to go through the process of applying mathematics, teaching should take the process of “problem situations - establishing models - explaining, applying and expanding”. Mathematical situation is an important source for students to master knowledge, form ability and develop psychological quality. It is to communicate real life with maths learning, and specific problems and abstract concepts