简便运算:0.9+0.98+0.997+0.9996+0.99995+0.999994
问题描述:
简便运算:0.9+0.98+0.997+0.9996+0.99995+0.999994
答
0.9+0.98+0.997+0.9996+0.99995+0.999994 =(1-0.1)+(1-0.01)+(1-0.001)+…… =6-(0.1+0.01+0.001+……) =6-0.111111 =5.888889