Schriftliches Addieren/Dreiersystem/1/Aufgabe/Lösung

Es ist

${\displaystyle \,\,\,\,\,201021}$

${\displaystyle +112002}$

${\displaystyle {\underline {\,\,1\,\,\,1\,\,\,11\,\,\,\,}}}$

${\displaystyle \,\,1020100.}$