התחבר/י באמצעות
- או -
\[\begin{aligned} 500-200=? \end{aligned}\]
\[\begin{aligned} 700-400=? \end{aligned}\]
\[\begin{aligned} 300-100=? \end{aligned}\]
\[\begin{aligned} 200+400=? \end{aligned}\]
\[\begin{aligned} 100+800=? \end{aligned}\]