数学教学大纲指出:“不仅要使学生学到知识。还要重视学生获取知识的思维过程。”数学教学的关键是数学思维活动的训练。充分暴露思维过程,使学生在教师引导下,在探索新知的过程中,实现知识训练的智力价值。这对提高学生的数学素养,真正变应试教育为素质教育,具有十分重要的意义。一、创设问题情境,引发思维过程 The mathematics syllabus states: “It is important not only to enable students to acquire knowledge, but also to attach importance to students' thinking process of acquiring knowledge.” The key to mathematics teaching is the training of mathematical thinking activities. Fully expose the process of thinking, so that students under the guidance of teachers, in the process of exploring new knowledge, intellectual training to achieve intellectual value. This is of great significance to improving students' mathematical qualifications and truly changing exam-oriented education as a quality education. First, create a problem situation, triggering the thinking process