分数的学习对于小学生来说需要一个较长的过程。从三年级对分数的初步认识到五年级对分数的再认识,一直到分数的运算学习直至百分数的认识和学习,时间 Fractional learning requires a long process for primary school students. From the third grade on the initial recognition of the score to the fifth grade on the re-understanding of the score, until the operation of the fraction until the percentage of understanding and learning, time