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%%  Ein Beispiel der DANTE-Edition
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%%  2. Auflage
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%%  Beispiel 06-03-109 auf Seite 281.
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%%  Copyright (C) 2016 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.
%% 
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% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{97.16928pt}
\usepackage[utf8]{inputenc}
%StartShownPreambleCommands
\usepackage{siunitx} \usepackage{booktabs}
%StopShownPreambleCommands
\begin{document}
\begin{tabular}{
  S[group-separator={},output-decimal-marker={\,\pm\,},
  input-digits={0123456789.},input-decimal-markers=+]}\toprule
\emph{Zahlenwerte}\\\midrule
 2.3456 + 0.02  \\
34.2345 + 0.001 \\
56.7835 + 0.067 \\
90.473  + 0.021 \\\bottomrule
\end{tabular}
\end{document}