2.9+2.99+2.999+……2.9999999999=( ) 日期：2016-11-05 21:35:19 人气：1 2.9+2.99+2.999+……2.9999999999=( ) 2.9+2.99+2.999+……2.9999999999 =3x10-0.1111111111 =29.8888888889
