@ARTICLE {, title = {Úloha Akcia}, author = {Černek, Pavol and Kubáček, Zbyněk and Bednářová, Svetlana and Žabka, Ján and Gyürki, Štefan and Demetrian, Michal}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2007}, volume = {36}, number = {4}, pages = {7--10}, issn = {1335-4981}, abstract = {Math in daily life can serve as a good motivation for pupils. We show some problems of various difficulty concerned with discounts and percentage calculations.}, }