The following minimal working example shows how to do so:

% Beamer columns

% Theme choice


\begin{frame}{Two columns example}

% start the columns environment    

% Column 1
        Left Part contents

% Column 2    
        Right Part contents



and the result is shown below:

split a frame to two columns in beamer
How a slide with two columns looks in beamer

For more columns, you can create more column environment inside columns environment with the width that you like.