כפל במאונך

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 808 } \\
\times 195 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{4040} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{7272} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{808} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{157560} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 645 } \\
\times 959 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{5805} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{3225} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{5805} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{618555} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 843 } \\
\times 143 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{2529} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{3372} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{843} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{120549} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 931 } \\
\times 484 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{3724} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{7448} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{3724} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{450604} \,
\end{array} \end{equation}
\]