苏霍姆林斯基说过:“在人的心灵深处,都有一种根深蒂固的需要,这就是希望自己是一个发现者、研究者、探索者,而在儿童的精神世界中,这种需要特别强烈。”学生学习数学的过程应该是一个学生亲自参与、丰富、生动的思维过程;要让学生自主探索,经历一个实践的过程。三位数退位减的算法,看似很简单的教学,但是在过程中如何让学生自己探索、自己发现,是一个难点。在教学中,我尝试让学生自主探究,充分经历计算的过程。 Sukhomlinski said: “There is a deep-rooted need in the depths of human beings, which is to hope that we are a discoverer, researcher and explorer. In the spiritual world of children, this Need to be particularly strong. ”" The process of students learning mathematics should be a student personally involved, rich and vivid thinking process; let students explore on their own, through a process of practice. Algebraic abatement algorithm, seemingly very simple teaching, but in the process of how to allow students to explore their own discovery, is a difficult task. In teaching, I try to allow students to explore their own, fully experienced the calculation process.