例题只为学生的学习活动提供了学习主题、基本线索和知识结构,往往受到自身编排和普适性的限制,有些内容甚至只是以结论的形式出现。为了使学生更加适应数学学习的过程,教师可对例题进行适当的改编,通过演变,把握问题的实质,从而有利于进一步地探索。这样,不仅能更好地掌握知识,而且能提高学生数学理解和数学应用的能力。 The examples provide learning topics, basic clues and knowledge structure for students’ learning activities, which are often limited by their own layout and universality. Some of them even appear in the form of conclusions. In order to make students adapt more to the process of mathematics learning, teachers can make appropriate adaptations to the examples, and through evolution, grasp the essence of the questions so as to be conducive to further exploration. In this way, not only can we better grasp the knowledge, but also improve students’ ability of math understanding and math application.