可写出27个不同的真分数1/2 1/3 1/4 1/5 1/6 1/7 1/8 1/92/3 2/4 2/5 2/6 2/7 2/8 2/93/4 3/5 3/6 3/7 3/8 3/94/5 4/6 4/7 4/8 4/95/6 5/7 5/8 5/96/7 6/8 6/97/8 7/98/9因为1/2= 2/4 =3/6 =4/8 1/3 =2/6 =3/9 1/4 =...