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Cel mai inteligent răspuns!
2014-06-03T17:11:27+03:00
Pai, ar trebui sa stii ca o ora are 60 minute
 \frac{1}{2} *60'=30' \\  \frac{3}{4} *60'= \frac{180}{4} =45' \\ \frac{1}{10} *60'=6' \\ \frac{1}{6} *60'=10' \\  \frac{1}{5} *60'=12' \\  \frac{1}{3} *60'=20' \\  \frac{2}{3} *60'= \frac{120}{3} =40' \\ \frac{2}{5} *60'= \frac{120}{5} =24'