a. Ustal ile to minut:
[tex]\dfrac{1}{2}\ h=\dfrac{1}{2}\cdot1\ h=\dfrac{1}{2}\cdot60\ min=\dfrac{60}{2}\ min = \boxed{30\ min}[/tex]
[tex]4,5\ h=4,5 \cdot1\ h=4,5\cdot60\ min=\boxed{270\ min}[/tex]
[tex]\dfrac{1}{4}\ doby=\dfrac{1}{4}\cdot1\ doba=\dfrac{1}{4}\cdot24\ h=\dfrac{24}{4}\ h=6\ h=6\cdot1\ h=6\cdot60\ min=\boxed{360\ min}[/tex]
[tex]1500 \ s=1500:60\ min=150:6\ min=\boxed{25\ min}[/tex]
b. Ustal ile to godzin:
[tex]3\ doby=3\cdot1\ doba=3\cdot24\ h=\boxed{72\ h}[/tex]
[tex]\dfrac{1}{6}\ doby=\dfrac{1}{6}\cdot1\ doba=\dfrac{1}{6}\cdot24\ h=\dfrac{24}{6}\ h=\boxed{6\ h}[/tex]
[tex]150 \ min = 150:60\ h=15:6\ h=\boxed{2,5\ h}[/tex]
[tex]45\ min = 45:60\ h=\boxed{0,75\ h}[/tex]
