Let $y = 0.(\overline{123}) + (\overline{345})$. When y is written out as a repeating decimal, what is the sum of the digits in a single repeating period? (In other words, what is the sum of the digits covered by the repeat bar?)
Did you forget 0. ? and what are the brackets for?
\(0.\overline{123}+\\ 0.\overline{345}\\~\\ 0.\overline{468} \)
4+6+8=?
