diff --git a/structure.tex b/structure.tex
index cf03c6d..6820e5e 100644
--- a/structure.tex
+++ b/structure.tex
@@ -277,3 +277,34 @@
 % https://tex.stackexchange.com/a/146312
 \newlist{mylist}{enumerate*}{1}
 \setlist[mylist]{label={\alph*)},font={\color{red!25!black}\bfseries}}
+
+
+% https://cscrunch.com/blog/corey-pennycuff/scripting-latex-create-base-conversion-worksheet
+\def\colwidth{.42cm}
+\newcommand{\baseconvertpractice}[2]{% number, # to not censor (1-3, or 0 for none)
+  \renewcommand\arraystretch{2}
+  \FPeval{\num}{#1}%
+  \begin{tabular*}{\textwidth}{@{\extracolsep{\fill}}r|*{8}{>{\centering}p{\colwidth}|}|*{8}{>{\centering}p{\colwidth}|}@{}c@{}} \cline{2-17}%
+  Decimal & \multicolumn{16}{ r| }{\censorifnotequal{\num}{#2}{1}} &\\ \cline{2-17}%
+  Binary & \censorifnotequal{\getdigit{\num}{16}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{15}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{14}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{13}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{12}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{11}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{10}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{9}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{8}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{7}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{6}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{5}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{4}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{3}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{2}{2}}{#2}{2} &%
+  \censorifnotequal{\getdigit{\num}{1}{2}}{#2}{2} &\\ \cline{2-17}%
+  Hexadecimal & \multicolumn{4}{c|}{\censorifnotequal{\getdigit{\num}{4}{16}}{#2}{3}} &%
+    \multicolumn{4}{c||}{\censorifnotequal{\getdigit{\num}{3}{16}}{#2}{3}} &%
+    \multicolumn{4}{c|}{\censorifnotequal{\getdigit{\num}{2}{16}}{#2}{3}} &%
+    \multicolumn{4}{c|}{\censorifnotequal{\getdigit{\num}{1}{16}}{#2}{3}} &\\ \cline{2-17}%
+  \end{tabular*}%
+}