\documentclass{beamer}
%\usetheme{Warsaw}
%\usetheme{PaloAlto}
%\usetheme{Singapore}
%\usetheme{Copenhagen}
%\usecolortheme{rose}
\usepackage{color,amsmath}
\usepackage{empheq,fancybox}
\usepackage{pst-node} 
\usepackage{amsthm,amssymb,amsmath,mathrsfs}
%\usepackage{array}
%\usepackage{colortbl}
%\usepackage{array}
%\usepackage[table]{xcolor}
\definecolor{umbra}{rgb}{0.8,0.8,0.5}
\newcommand*\zero{\multicolumn{1}{>{\columncolor{white}}c}{0}}
\newcommand\colCell[2]{\multicolumn{1}{>{\columncolor{#1}}c}{#2}}
\usepackage{xepersian}
%\def\baselinestretch{1.3}
\linespread{1.3}
\settextfont{XB Zar}
\setromantextfont[Scale=1]{Junicode}
\setdigitfont{Parsi Digits}
\defpersianfont\nastaliq[Scale=2]{IranNastaliq}
\AtBeginDocument{\setdigitfont[Scale=1]{Parsi Digits}}
\begin{document}
\begin{frame}
\bigskip
\bigskip
\begin{center}
\textbf{جدول 1.}\textit{جواب های تقریبی و دقیق برای مثال 1}\\
{\scriptsize{
\begin{table}[!hbp]
\centering
\begin{tabular}{|c||c|c|c||c|}
     \hline
جواب دقیق  &روش حاضر & روش حاضر &روش حاضر & نقاط \\
 &  با $\colorbox{cyan}{$n=6$}$& با $\colorbox{orange}{$n=3$}$ &  با $\colorbox{green}{$n=2$}$ &  \\    
     \hline 
$\colorbox{yellow}{$0 $}$&$\colorbox{cyan}{$ 0$}$  &  $\colorbox{orange}{$ 0$}$  &  $\colorbox{green}{$0 $}$   &$\colorbox{brown}{$0 $}$\\[3pt]
$\colorbox{yellow}{$0.01000000000 $}$ & $\colorbox{cyan}{$0.01000000005 $}$ &
$\colorbox{orange}{$ 0.01000017841$}$ & $\colorbox{green}{$0.009997098280 $}$& $\colorbox{brown}{$0.1 $}$\\[3pt]
$\colorbox{yellow}{$0.04000000000 $}$ & $\colorbox{cyan}{$0.04000000011 $}$ &
$\colorbox{orange}{$ 0.04000041093$}$ & $\colorbox{green}{$0.03998839312 $}$&$\colorbox{brown}{$0.2 $}$ \\[3pt]
$\colorbox{yellow}{$0.09000000000 $}$ & $\colorbox{cyan}{$0.09000000017 $}$ &
 $\colorbox{orange}{$0.09000050992 $}$ &  $\colorbox{green}{$0.08997388452 $}$ & $\colorbox{brown}{$0.3 $}$\\[3pt]
$\colorbox{yellow}{$0.1600000000 $}$ & $\colorbox{cyan}{$0.1600000003 $}$  & 
 $\colorbox{orange}{$ 0.1600005301$}$  &   $\colorbox{green}{$0.1599535725 $}$ & $\colorbox{brown}{$0.4 $}$ \\[3pt]
$\colorbox{yellow}{$0.2500000000 $}$ & $\colorbox{cyan}{$0.2500000006 $}$  &
  $\colorbox{orange}{$0.2500006271 $}$  &    $\colorbox{green}{$0.2499274570 $}$ & $\colorbox{brown}{$0.5 $}$\\[3pt]
$\colorbox{yellow}{$0.3600000000 $}$ & $\colorbox{cyan}{$0.3600000009 $}$  & 
 $\colorbox{orange}{$0.3600009158 $}$  &   $\colorbox{green}{$0.3598955381 $}$& $\colorbox{brown}{$0.6 $}$\\[3pt]
$\colorbox{yellow}{$0.4900000000 $}$ & $\colorbox{cyan}{$0.4900000016 $}$  & 
 $\colorbox{orange}{$0.4900013302 $}$  &  $\colorbox{green}{$0.4898578157 $}$ & $\colorbox{brown}{$0.7 $}$\\[3pt]
$\colorbox{yellow}{$0.6400000000 $}$ & $\colorbox{cyan}{$0.6400000022 $}$  &
  $\colorbox{orange}{$0.6400014801 $}$  &   $\colorbox{green}{$0.6398142899 $}$& $\colorbox{brown}{$0.8 $}$\\[3pt]
$\colorbox{yellow}{$0.8100000000 $}$ & $\colorbox{cyan}{$0.8100000026 $}$  & 
 $\colorbox{orange}{$0.8100005113 $}$  &   $\colorbox{green}{$0.8097649607 $}$& $\colorbox{brown}{$0.9 $}$\\[3pt]
$\colorbox{yellow}{$1 $}$ & $\colorbox{cyan}{$1.000000003 $}$  &  $\colorbox{orange}{$1.000009640 $ }$ &  $\colorbox{green}{$1.000017182 $}$   & $\colorbox{brown}{$1 $}$\\[3pt]
     \hline
\end{tabular}
%\caption{مثال 4}
\end{table}
}}
\end{center}
\bigskip
\bigskip
\end{frame}
\end{document}