Question

Replace each * by the correct digit in the following:

\[\begin{array}{r}
&\texttt{6 1 7 2}\\
-&\texttt{* * 6 9}\\
\hline
&\texttt{2 9 * *}
\end{array}\]

Answer 1

\[\begin{array}{r}
&\texttt{6 1 7 2}\\
-&\texttt{3 2 6 9}\\
\hline
&\texttt{2 9 0 3}
\end{array}\]