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