1010
1000
----
0010

documentclass[twoside,english]{article}
usepackage[T1]{fontenc}
usepackage[latin9]{inputenc}
setcounter{secnumdepth}{2}
setcounter{tocdepth}{2}
usepackage{babel}
begin{document}
newdimendigitwidth
settowidthdigitwidth{0}
def~{hspace{digitwidth}}
defdivrule#1#2{%
noalign{moveright#1digitwidth%
vbox{hrule width#2digitwidth}}}
begin{tabular}[b]{@{}r@{}}
%10010
\ hline
big|begin{tabular}[t]{@{}l@{}}
1010 1111\
1000 1000 \
divrule{0}{10}
~~ 1000 1000 \
end{tabular}
end{tabular}
end{document}

newlength{digitwidth}
newcommanddivrule[2]{noalign{moveright#1digitwidthvbox{hrule width#2digitwidth}}}
newenvironment{bdivision}[1]
  {settowidthdigitwidth{0}setlength{tabcolsep}{digitwidth}%
   def~{hspace{digitwidth}}%
   hphantom{#1~vrule}begin{tabular}{l@{}}
   hlinerelaxllap{#1~vrulestruthspace{tabcolsep}kern-0.4pt}ignorespaces}
  {end{tabular}}

begin{bdivision}{10010}
1010~1111~1111~1111~0000~0010\
1000~1000~0001~0000~1 \
divrule{1}{21}
~~10~0111~1110~1111~100 \
~~10~0010~0000~0100~001 \
divrule{3}{27}
~~~~~~101~1110~1011~1010~00
end{bdivision}

documentclass[twoside,english]{article}
usepackage[T1]{fontenc}
usepackage[latin9]{inputenc}
usepackage{babel}

usepackage{listings}
usepackage{xcolor}% can remove this if you don't want color in output

setcounter{secnumdepth}{2}
setcounter{tocdepth}{2}

newdimendigitwidth%
settowidthdigitwidth{0}%
def~{hspace{digitwidth}}%
defdivrule#1#2{%
noalign{moveright#1digitwidth%
vbox{hrule width#2digitwidth}}}%

newcommand*{Resize}[1]{makebox[digitwidth]{#1}}%
lstdefinestyle{BinaryNumber}{%
    literate={1}{textcolor{blue}{Resize{1}}}{1}%
             {0}{textcolor{red}{Resize{0}}}{1}%
             {,}{Resize{phantom{ }}}{1}%
             { }{Resize{phantom{ }}}{1},%
   basicstyle=ttfamily,%  Optional to use this
}
newcommand{Binary}[1]{%
    lstinline[style=BinaryNumber]{#1}%
}


begin{document}
Binary{10010}
begin{tabular}[b]{@{}r@{}}
\ hline
big|%
begin{tabular}[t]{@{}l@{}}
Binary{1010 1111}\
Binary{1000 1000}\
divrule{0}{10}
Binary{,,,1 0000 1000} \
end{tabular}
end{tabular}
end{document}

documentclass{article}
begin{document}
With textt:
texttt{newline%
1010newline
1000newline
----newline
0010newline
}
end{document}

documentclass{article}
begin{document}
begin{tabular}{*{4}{@{}c@{}}}% 4 centered columns without interspaced gaps
  1&0&1&0           1&0&0&0 \ hline
  0&0&1&0
end{tabular}
end{document}

documentclass{article}
usepackage{array}% http://ctan.org/pkg/array
newcolumntype{B}{*{4}{@{}c@{}}}% One byte/4 bits
begin{document}
begin{tabular}{B@{~}B@{~}B@{~}B@{~}B}% 5 centered bytes with ~ as gaps
  1&0&1&0 & 1&1&1&1 & 1&1&1&1 & 1&1&1&1 & 0&0&0&0           1&0&0&0 & 1&0&0&0 & 0&0&0&1 & 0&0&0&0 & 1&1&0&1 \ hline
  0&0&1&1 & 1&0&0&0 & 0&0&0&0 & 1&1&1&1 & 1&1&0&1
end{tabular}
end{document}

documentclass{article}
begin{document}
{noindentttfamily
  1010           1000           ----           0010
}
end{document}

documentclass{article}
begin{document}
ttfamilybegin{tabular}{@{}c@{}}
  1010           1000 \ hline
  0010
end{tabular}
end{document}

documentclass{article}

usepackage{amsmath}

begin{document}

[
begin{matrix}
  1 & 0 & 1 & 0 \
  1 & 0 & 0 & 0 \
  hline
  0 & 0 & 1 & 0
end{matrix}
]

end{document}

documentclass{article}

usepackage{verbatim}

begin{document}

begin{verbatim}
1010
1000
----
0010
end{verbatim}

end{document}