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分数实际问题是小学六年级学习的重要内容。此前,学生从三年级上册就开始认识分数,对分数已经积累了相当多的经验储备。特别是分数的意义,已逐步趋于完善,并能建立分数的意义的多重表征。苏教版教材六年级上册“分数乘法”单元,先教学分数与整数相乘,接着教学“求一个数的几分之几是多少”的实际问题。之后,又通过例3,教学“已知一个数比另一个数多(少)几分之几,求两个数相差多少”的实际问题(如图1)。
The practical problem of grade is an important part of sixth grade study in primary school. Previously, students began to recognize scores from the third grade, and had accumulated a considerable amount of experience for the scores. In particular, the meaning of the scores has gradually become more refined and can establish multiple representations of the meaning of the scores. Su teach version of textbooks sixth grade on the book “fractional multiplication ” unit, the first teaching score multiplied by integers, followed by teaching “a few minutes to find a number of how much is ” the actual problem. Then, through Example 3, we teach the practical problem of “how many different numbers between two numbers” (Figure 1).