%% 
%%  An UIT Edition example
%% 
%%  Example 09-20-1 on page 196.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\usepackage{xlop}
\StopShownPreambleCommands
\begin{document}
\opadd[style=text]{02.8}{1.2}\par
\opadd[style=text,deletezero=false]{02.8}{1.2}\par
\opsub[carrysub,lastcarry,columnwidth=2.5ex,
  offsetcarry=-0.4,decimalsepoffset=-3pt,
   deletezero=false]{12.34}{5.67}
\end{document}