1-1/10-1/100-1/1000-.-1/100000000=?简便计算过程

问题描述:

1-1/10-1/100-1/1000-.-1/100000000=?简便计算过程

1-1/10-1/100-1/1000-.-1/100000000
=1-0.1-0.01-0.001-0.0001-……-0.00000001
=1-(0.1+0.01+0.001+0.0001+……+0.00000001)
=1-0.11111111
=0.88888889