我们都知道,在《小学数学教学大纲》指导下的数学教材, 在新课教学前,大都会安排准备题供复习铺垫使用。准备题的内容一般是与新知识密切相关的旧知识,其作用是激活处于“休眠”状态的旧知识,形成思维定向,使学生顺利理解新授内容,并以此缩短新授时间, 保证练习时间,提高课堂教学目标的达成度。 We all know that under the guidance of the “Mathematics Teaching Syllabus for Primary Schools”, math textbooks are prepared for memorization before the new course is taught. Preparation of the content is generally closely related with the new knowledge of the old knowledge, its role is to activate the old knowledge in the “dormant” state, the formation of thinking orientation, so that students successfully understand the new content, and in order to shorten the new teaching time, to ensure practice Time, improve the degree of achievement of classroom teaching objectives.