6.列竖式计算。
93-27
356×7
673×4
208×6
750×4
420×6
412-87
372×3
305×5

$\begin{array}{r} 93\\ -27\\ \hline 66\end{array}$
$93-27=66$
$\begin{array}{r} 356\\ ×\ \ 7\\ \hline 2492\end{array}$
$356×7=2492$
$\begin{array}{r} 673\\ ×\ \ 4\\ \hline 2692\end{array}$
$673×4=2692$
$\begin{array}{r} 208\\ ×\ \ 6\\ \hline 1248\end{array}$
$208×6=1248$
$\begin{array}{r} 750\\ ×\ \ 4\\ \hline 3000\end{array}$
$750×4=3000$
$\begin{array}{r} 420\\ ×\ \ 6\\ \hline 2520\end{array}$
$420×6=2520$
$\begin{array}{r} 412\\ -\ \ 87\\ \hline 325\end{array}$
$412-87=325$
$\begin{array}{r} 372\\ ×\ \ 3\\ \hline 1116\end{array}$
$372×3=1116$
$\begin{array}{r} 305\\ ×\ \ 5\\ \hline 1525\end{array}$
$305×5=1525$