Răspuns :
presupunem ca sunt numai vase de 3 l
12x3=36 l
71-36=35 l in plus
10-3=7
35:7=5 vase de 10 l
5x10=50l
71-50=21l
21:3=7 vase de 3 l
verificare: 3x7+5x10=21+50=71 l
presupunem ca sunt numai vase de 3 l
12x3=36 l
71-36=35 l in plus
10-3=7
35:7=5 vase de 10 l
5x10=50l
71-50=21l
21:3=7 vase de 3 l
verificare: 3x7+5x10=21+50=71 l