GRE数学词汇大全--有关分数和小数：
proper fraction真分数?
improper fraction假分数?
mixed number带分数?
vulgar fraction，common fraction普通分数
simple fraction简分数?
complex fraction繁分数??
numerator分子?
denominator分母?
(least)common denominator(最小)公分母?
quarter四分之一?
decimal fraction纯小数?
infinite decimal无穷小数?
recurring decimal循环小数?
tenths unit十分位