《新课程标准》强调:教师要能转变教育观念,教学方法.鼓励学生质疑问题,探究思考.让学生感受和体验数学知识产生,发展和应用过程.本文通过以退为进数学思想的探讨,结合学生的反思,使数学学习成为再发现再创造的过程.一、以退为进的原则东汉将领朱儁攻打起义军占领的原城时,久攻不下,假装 The New Curriculum Standard emphasizes that teachers should be able to change their concepts of education and teaching methods, encourage students to question questions, explore and think, enable students to feel and experience the process of producing, developing and applying mathematical knowledge.Through the discussion of retreating into mathematical thinking, Combined with the reflection of students, so that mathematics learning become rediscovery and re-creation of the process of retreat into the principle of the Eastern Han generals Zhu Jun attack the rebel forces occupied the original city, long time no less than pretend