《数学课程标准》指出“:学生是数学学习的主人,教师是数学学习的组织者和合作者。”因而我们应努力摒弃传统的“教师讲学生听”的填鸭式教学模式,强化学生参与数学活动的主动性和积极性要真正发挥教师在课堂教学中的“指导者和合作者”的作用,教师不妨在课堂教学中巧做“减法”:改变教师在课堂上的一手包办,减少教师在课堂上繁复冗长的分析、空洞的解释,减掉教师不放心的千叮万咛……把节余的时间留给学生质疑、操作、探索、创造,这才是 The standard of mathematics curriculum states: “Students are the masters of mathematics learning and teachers are the organizers and collaborators of mathematics learning.” Therefore, we should try our best to abandon the spoon-fed teaching mode of traditional “teacher speaking students” To enhance students’ initiative and enthusiasm in participating in mathematics activities To make teachers’ “mentors and collaborators” in class teaching truly play a role, teachers may wish to make “subtraction” in classroom teaching: to change the teachers’ To reduce teachers ’tedious lengthy analysis in the classroom, empty explanations, and loss of teachers’ uneasy anxiety ...... Leave the time saved for students to question, operate, explore and create