论文部分内容阅读
估算在日常生活中有着很广泛的应用,它为判断口算和笔算结果是否合理提供了依据,也有利于人们事先把握运算结果的范围,是发展学生数感的重要途径,同时对学生的后续学习有重要作用。
Estimation has a very wide range of applications in daily life. It provides the basis for judging the validity of the port count and the pen result, as well as helping people grasp the range of the result in advance. It is also an important way to develop the sense of number of students. At the same time, Have an important role.