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题目:4个空瓶可换一瓶汽水(带瓶)。某班同学共喝了120瓶汽水,其中一些是用喝剩下的空瓶换的,那么他们买了汽水多少瓶? 分析与解:此题按常规思路,就是要从他们已喝的120瓶汽水中,分出他们买的汽水瓶数和用喝剩下的空瓶换来的汽水瓶数,而买的汽水瓶数是未知的,因此解起来有些棘手。但若仔细分析题意会发现:
Title: 4 empty bottles for a bottle of soft drinks (bottles). A class of students drank a total of 120 bottles of soft drinks, some of which are used to drink the rest of the empty bottles for, then they bought a bottle of soda? Analysis of reconciliation: This question by conventional wisdom, is to drink from them 120 bottles In the soft drinks, the number of soda bottles they buy and the number of soda bottles they buy from the remaining empty bottles are unknown, and the number of soda bottles they buy is unknown, making it tricky to dissolve. However, if you analyze the questions carefully, you will find: