Students from Class 1, Class 2 and Class 3 clean up the school playground. Each class is responsible for cleaning the entire playground (1/3). After 10 minutes, Class 1 has completed the task of the class (3/4) , Six Class 2 completed the class (4/5), and Class Six 3 completed the class (5/6). Now, six or so classes are completed more slowly.
六1班、六2班和六3班同学在学校操场上打扫卫生，每班负责打扫整个操场的(1/3)，10分钟后，六1班已完成本班任务的(3/4)，六2班完成了本班的(4/5)，六3班完成了本班的(5/6)．现在，六多少班完成的慢一些．
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