TY - JOUR T1 - Úloha Akcia A1 - Černek, Pavol A1 - Kubáček, Zbyněk A1 - Bednářová, Svetlana A1 - Žabka, Ján A1 - Gyürki, Štefan A1 - Demetrian, Michal JA - Obzory matematiky, fyziky a informatiky Y1 - 2007 VL - 36 IS - 4 SP - 7 EP - 10 SN - 1335-4981 N2 - 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. ER -