心理学家皮亚杰说:“儿童的思维是从动作开始的,切断动作与思维的联系,思维就不能得到发展。”低年级学生的思维处在具体形象思维为主,逻辑思维开始萌芽的阶段,数学学习中更多的是借助图形语言来掌握概念、理解算理。在教学《11减几》中,教师要认识到操作活动的重要性,将学生的动手操作和对算理的理解有机地结合起来,并渗透数形结合思想,以提高低年级学生的计算能力。 Piaget, a psychologist, said: “Children’s thinking begins with the action, cutting off the connection between action and thinking, and thinking can not be developed.” “The thinking of the lower-grade students is mainly in concrete thinking and the logical thinking begins Budding stage, mathematics learning more is the use of graphical language to grasp the concept of understanding of arithmetic. In the teaching ”11 minus a few", teachers should recognize the importance of operating activities, combine the students’ hands-on operation with the understanding of arithmetic, and penetrate the idea of ​​number combining to improve the computing power of lower-level students .