[Tex/LaTex] Numbering Vertical Addition Problems

arraysnumbering

Right now I have the following for a vertical addition problem but I would also like it to be numbered without messing everything else up.

\begin{array}{c@{\,}c}
  & 1 \\
+ & 1 \\
\hline
  & 2 \\
\end{array}

Best Answer

You could also just use an enumerate type of environment. With that I would recommend you use the aligned environment which will allow specification of alignment of the numbers, but array can be used as well:

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Note:

The addition problem used a macro only to improve readability in this example.

Code:

\documentclass{article}
\usepackage{amsmath}

\newcommand*{\ProblemInArray}{\quad%
    \begin{array}{c@{\,}c}
          & 1 \\
        + & 1 \\
        \hline
          & 2 \\
    \end{array}
}%

\newcommand*{\ProblemInAligned}{\quad%
    \begin{aligned}[t]% Choose alignement: t, b, or c
          & 1 \\
        + & 1 \\
        \hline
          & 2
    \end{aligned}
}%

\begin{document}\noindent
Using \texttt{array} environemnt
\begin{enumerate}
    \item $\ProblemInArray$
    \item $\ProblemInArray$
\end{enumerate}
%
Using \texttt{aligned} environemnt
\begin{enumerate}
    \item $\ProblemInAligned$
    \item $\ProblemInAligned$
\end{enumerate}
\end{document}

Related Solutions

[Tex/LaTex] Numbering an array as one single equation LaTeX

Using the eqnarray environment instead of array, you can add \nonumber to any lines you don't want numbered. If you don't do this, every line will be numbered.

\begin{eqnarray}
N_{x,sk} &=& k_{sk}\left(\frac{t_{sk}}{b_{sk}}\right)^{2}\bar{Et} \nonumber \\
N_{x,st} &=& k_{st}\left(\frac{t_{st}}{b_{st}}\right)^{2}\bar{Et}
\end{eqnarray}

(Just remove the \nonumber from the above to get the second example.)

[Tex/LaTex] Procedure numbering in algorithm2e

The procedure environment is a special form of the algorithm environment. Passing the option procnumbered to algorithm2e numbers procedures using the same counter as algorithms: