本文试图通过一系列例题,对工程问题作一个小结,供教师指导学生复习或组织课外活动时参考。 一、工程问题的特点 例1 某工人4小时生产20个零件,平均每小时生产几个? 20÷4=5(个) 答:平均每小时生产5个。 例2 某工人4小时生产完一批零件,平均每小时生产这批零件的多少? 因为题目中没有告诉这批零件的个数,我们把它看作整体“1”,所以 This article attempts to make a summary of engineering problems through a series of examples, for teachers to guide students to review or organize extracurricular activities for reference. First, the characteristics of engineering problems Example 1 4 hours a worker to produce 20 parts, the average hourly production of several? 20 ÷ 4 = 5 (a) A: The average hourly production of five. Example 2 A worker 4 hours after the completion of the production of a batch of parts, the average hourly production of these parts? Because the title did not tell the number of parts, we see it as a whole “1”, so