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有些较复杂的分数应用题,用常规方法求解比较麻烦,而且容易出错。如果我们根据分数的意义,把已知条件中的“分率”转
Some of the more complex scores of application questions, use the conventional method to solve more trouble, and error-prone. If we according to the meaning of the score, the known conditions in the “fraction” turn