《数学课程标准》提出:“学生的数学学习内容应当是现实的、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。”在数学教学过程中,如果要将数学知识的教学与现实实际生活相联系,就必须灵活使用教材,以现实生活为背景创造教学案例,不能生搬硬套课本,以课堂教学 The Mathematics Curriculum Standard states: “The students ’mathematics learning content should be realistic, meaningful and challenging, which should be conducive to students’ initiative in mathematics such as observation, experiment, speculation, verification, reasoning and communication Activities. ”" In the process of mathematics teaching, if we want to relate the teaching of mathematics knowledge with the real life, we must use the teaching materials flexibly and create the teaching cases in the background of real life. We should not make hard copies of the textbooks,