1989 AJHSME Problem 14
Source:
June 25, 2011
Problem Statement
When placing each of the digits in exactly one of the boxes of this subtraction problem, what is the smallest difference that is possible?\begin{tabular}[t]{cccc}
& \boxed{} & \boxed{} & \boxed{} \\
- & & \boxed{} & \boxed{} \\ \hline
\end{tabular}