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小升初数学重点题型，求约分前的分数值，掌握思路和方法很重要
小升初数学重点题型，求约分前的分数值，掌握思路和方法很重要 一个最简分数，分子与分母的和是62。若分子减去1，分母减去7，所得的分数约分后为𝟐/𝟕，则原分数是( )？
小升初数学总复习232/299
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