כפל במאונך

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 555 } \\
\times 822 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1110} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{1110} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{4440} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{456210} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 449 } \\
\times 547 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{3143} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{1796} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{2245} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{245603} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 510 } \\
\times 923 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1530} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{1020} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{4590} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{470730} \,
\end{array} \end{equation}
\]

פתרו את התרגיל
\[
\begin{equation} \begin{array}{r}
\smash{ 191 } \\
\times 719 \\ \hline
\Rule{0pt}{5pt}{0pt}
\INPUTBOX{1}{rtl}{1719} \, \\
\smash[t]{ \INPUTBOX{2}{rtl}{191} \, \, \, \, \, }
\Rule{0pt}{6.5pt}{8.5pt} \\
\smash[t]{ \INPUTBOX{3}{rtl}{1337} \, \, \, \, \, \, \, \, \, }
\Rule{0pt}{1.5pt}{0pt}
\\
\hline \INPUTBOX{4}{rtl}{137329} \,
\end{array} \end{equation}
\]