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该书是《金家孩子学理财》系列丛书（共二十册）中的第七册。本书既可以作为本系列的一部分来阅读，又可以独立成书。本书讲述了在没有交换媒介（比如货币）的情况下如何满足自己的需求。金乐乐，小天和金小米学会了以物物交换的方式交换他们的玩具，从而可以有不同的玩具玩。
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