苏教版教材数学六年级上册有这样一道习题:这道题,教材的编写意图是,进一步掌握求百分率问题的方法,体会百分率在数据分析过程中的作用。与第(1)题相比,第(2)题的难度增加了,两个杯子中水的质量不同,要加入的糖的质量也不相同,并且第(2)题的问题也变了。第(1)题的解题思路是先求出两杯糖水的含糖率,再比较含糖率的高低;第(2)题的问题具有开放性。这是一道具有“低起点,大空间”的习题。“低起 Sujiao version textbook mathematics sixth grade on the book has such a problem: This question, the teaching of the intent is to further grasp the method of seeking the percentage, understand the percentage in the data analysis process. Compared with (1), the difficulty of (2) is increased, the quality of water in two cups is different, the quality of sugar to be added is different, and the problem of (2) is also changed. Problem (1) problem-solving ideas is to first find the sugar content of two cups of sugar, and then compare the level of sugar; the problem of (2) is open. This is a problem with a ”low starting point, big space“. ”Low up