“一个数除以分数”(义务教育课程标准实验教科书六年级上册)的计算法则,是分数教学中的一个难点,尤其是对“算理”的理解。对这一难点,能不能让学生进行探究,又如何引导学生探究,也是一个值得“探究”的问题。不妨先看一看下面的教学案例。 “A number divided by the score ” (compulsory education curriculum standard experimental textbook sixth grade) calculation of the law, is a difficult point teaching, especially on “arithmetic ” understanding. To this difficulty, can let students explore, how to guide students to explore, but also a “worth exploring” issue. May wish to take a look at the following teaching case.