学生的计算错误,从现象来看,似乎大多是由“粗心”造成的,而“粗心”的原因不外乎两个方面:一是由于儿童的生理、心理发展尚不够成熟,另一方面则是由于没有养成良好的学习习惯。尽管我们的计算教学注重了它的“源头”——算理的理解,但学生在计算过程中依然是错误百 Students from the point of view of the phenomenon, it seems that most of them are caused by “carelessness ”, and “carelessness ” for no more than two reasons: First, because children’s physical and psychological development is not yet mature enough, On the other hand is due to not develop good study habits. Although our computational teaching pays attention to its “source ” - the comprehension of arithmetic, students are still in the process of calculating errors