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%% A: Brüche kürzen
%%
%%
%% Kürzen
\begin{frage}[2]
  Kürzen Sie:
  
 $$\frac{6a^2-6ab}{3a^2-6ab+3b^2}= ...........................$$\TRAINER{$\frac{2a}{a-b}$}
   
  \platzFuerBerechnungen{6}%%
\TRAINER{0.5 Pkt pro korrekte Faktorisierung}
\end{frage}
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