Question
Replace each * by the correct digit in the following:
$
\begin{array}{rrrrrrr}
1 & 0 & 0 & 0 & 0 & 0 & 0 \\
- & & * & * & * & * & 1 \\
\hline & * & 7 & 0 & 4 & 2 & * \\
\hline
\end{array}
$
$
\begin{array}{rrrrrrr}
1 & 0 & 0 & 0 & 0 & 0 & 0 \\
- & & * & * & * & * & 1 \\
\hline & * & 7 & 0 & 4 & 2 & * \\
\hline
\end{array}
$


