התחבר/י באמצעות
- או -
\[\begin{aligned} 200-100=? \end{aligned}\]
\[\begin{aligned} 600-600=? \end{aligned}\]
\[\begin{aligned} 200-200=? \end{aligned}\]
\[\begin{aligned} 900-800=? \end{aligned}\]
\[\begin{aligned} 600+300=? \end{aligned}\]