尽管是简单的一个数学问题,但它体现了人的数学思维的一个发展过程.现给出问题一:3瓶啤酒,3个空瓶换一瓶,共可喝到几瓶?答案(一年级学生)是3+1.问题二:4瓶啤酒,3个空瓶换一瓶,共可喝到几瓶?答案(二年级学生)是4+1,还余一空瓶.问题三:5瓶啤酒,3个空瓶换一瓶,共可喝到几瓶?答案(三年级学生)是5+1,还余两空瓶. Although it is a simple math problem, it embodies a process of development of human mathematics thinking. Now we give the question one: three bottles of beer, three empty bottles for one bottle, and a total of bottles to drink? Answer (first grade Student) is 3+1. Question 2: 4 bottles of beer, 3 empty bottles for a bottle, can drink a total of bottles? Answer (2nd grade students) is 4+1, still an empty bottle. Problem 3: 5 bottles Beer, 3 empty bottles for a bottle, can drink a total of bottles? Answer (third grade students) is 5 +1, there are still two empty bottles.