Abstract: The purpose of the research is to compare the differences between pupils and college students in mental arithmetic times and spans. Thirty college students and thirty pupils are received mental arithmetic test. The results shows: (1)that the spans of mental arithmetic of college students are more than that of pupils except multiplication, there are no significant differences in the multiplication.(2)that the spent times of subtract and division mental arithmetic of college student are significant briefer than that the pupils, but there are no significant differences in the multiplication.

Key words: pupils, college students, the spent times of mental arithmetic, the spans of mental arithmetic

摘要： 本研究的目的是比较小学生与大学生在口算时间和广度上的差异。30名大学生和30名6年级小学生接受了口算实验。结果显示：（1）大学生口算的广度明显大于小学六年级学生的口算广度。数字广度也大于小学生,但两者差异不显著;（2）在减法和除法的口算时间上,大学生明显短于小学六年级学生,但在乘法口算上无显著差异。

关键词: 小学生, 大学生, 口算时间, 口算广度