התחבר/י באמצעות
- או -
\[\begin{aligned} 500+300=? \end{aligned}\]
\[\begin{aligned} 1000-1000=? \end{aligned}\]
\[\begin{aligned} 400+300=? \end{aligned}\]
\[\begin{aligned} 900-600=? \end{aligned}\]
\[\begin{aligned} 300+400=? \end{aligned}\]