有以下可能性:
\documentclass{article}
\usepackage{cancel}
\usepackage{xcolor}
\begin{document}
\[\begin{array}{rrrl}
\color{blue}4&\color{blue}{12}&\color{blue}{11}\phantom{)_{10}}\\
(\cancel5&\cancel3&\cancel1)_{10}\\
(1&9&9)_{10}&-\\ \hline
(3&3&2)_{10}
\end{array}\]
\end{document}