\documentclass{article}
\usepackage{pdfpages}

\setlength\topmargin{-0.375in}
\setlength\headheight{0in}
\setlength\headsep{0in}
\setlength\textheight{9.5in}
\setlength\textwidth{7.0in}
\setlength\oddsidemargin{-0.25in}
\setlength\evensidemargin{-0.25in}

\begin{document}

\includepdf[pages=-,pagecommand={\thispagestyle{plain}}]{workbook-no-pagenums.pdf}

\end{document}