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在学生学习完“分数意义”后,我出示了一道练习题:某实验小学五年级开展了征文活动,下面是五年级三个班的获奖情况。先完成下表,再将表中的分数按从小到大的顺序排列出来。学生先算出三个班获奖作品分别占参赛作品数的1/3、1/2和2/5,然后把它们按从小到大的顺序进行了排列。循着学生的思路,我发现有多种不同的方法。
After the students finished “score meaning ”, I showed an exercise: a fifth grade experimental primary school essay activities, the following is the fifth grade three classes of awards. First complete the table below, then the table scores in ascending order. Students first figure out that three of the winning entries in the three classes respectively take up one-third, one-half, two-thirds and two-fifths of the number of entries, and then arrange them in ascending order. Follow the student’s thinking, I found a variety of different ways.