עָנוּ עַל הַשְּׁאֵלָה הַבָּאָה
הַשְׁלִימוּ אֶת לוּחַ הָחִבּוּר:
\begin{array}{c|c}
\hline
+ & 7 & 1 & 1 \\
\hline
2 & \INPUTBOX{4}{ltr}{9} & \INPUTBOX{5}{ltr}{3} & \INPUTBOX{6}{ltr}{3} \\
\hline
\INPUTBOX{1}{ltr}{1} & \INPUTBOX{2}{ltr}{8} & 2 & \INPUTBOX{3}{ltr}{2} \\
\hline
\INPUTBOX{7}{ltr}{2} & 9 & \INPUTBOX{8}{ltr}{3} & \INPUTBOX{9}{ltr}{3} \\
\end{array}
\hline
+ & 7 & 1 & 1 \\
\hline
2 & \INPUTBOX{4}{ltr}{9} & \INPUTBOX{5}{ltr}{3} & \INPUTBOX{6}{ltr}{3} \\
\hline
\INPUTBOX{1}{ltr}{1} & \INPUTBOX{2}{ltr}{8} & 2 & \INPUTBOX{3}{ltr}{2} \\
\hline
\INPUTBOX{7}{ltr}{2} & 9 & \INPUTBOX{8}{ltr}{3} & \INPUTBOX{9}{ltr}{3} \\
\end{array}