addsi.tex

\documentclass[12pt,twocolumn]{article}
\usepackage[utf8]{inputenc}

\usepackage[margin=1in]{geometry}

\usepackage{amsmath}

\usepackage{tikz}

\title{Adding and subtracting signed integers}
\author{Leomar Dur\'an}
\date{24\(^{\text{th}}\) November 2019}

\begin{document}

\thispagestyle{empty}

\newcounter{randtwo}

\begin{enumerate}
    \foreach \k in {1,...,108}{
        \item
            \pgfmathparse{random(2)}
            \setcounter{randtwo}{\pgfmathresult}
            \ifnum\therandtwo=1
                Compute:
            \else
                Evaluate:
            \fi
            \(
                \pgfmathparse{int(random(0,18)-9)}
                    \pgfmathresult
                \pgfmathparse{random(2)}
                    \setcounter{randtwo}{\pgfmathresult}
                    \ifnum\therandtwo=1
                        +
                    \else
                        -
                    \fi
                \pgfmathparse{random(2)}
                    \setcounter{randtwo}{\pgfmathresult}
                    \ifnum\therandtwo=1
                        \pgfmathparse{random(9)}
                        \pgfmathresult
                    \else
                        \left(
                            -\pgfmathparse{random(9)}
                            \pgfmathresult
                        \right)
                    \fi
            \)
    }
\end{enumerate}

\end{document}