Pomôžete mi s dvoma úlohami prosím: Mama urobila na večeru palacinky. Otec z nich zjedol jednu tretinu, syn zjedol jednu štvrtinu a dcéra zjedla 3 palacinky. Mame zoslalo 7 palaciniek. Koľko palaciniek mama urobila?
2.uloha: Jeden maliar vymaľoval dom sám za 9 hodín,druhý maliar za 6 hodín. Ako dlho by im trvalo maľovanie, keby maľovali spolu?
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