纯循环小数0.abcabcabc...用分数表示为abc/999由于分子和分母之和是442,所以分数abc/999为假分数.当abc+999=3*442时,abc=327,abc/999=327/999=109/333,符合题意当abc+999=4*442时,abc=769,abc/999=769/999,769+999>4...