4.
4 [tex]\frac{1}{3}[/tex] - [tex]\frac{4}{5}[/tex] = [tex]\frac{13}3} - \frac{4}{5}[/tex] = [tex]\frac{65}{15} - \frac{12}{15} = \frac{53}{15}[/tex]
[tex]\frac{53}{15} - \frac{4}{5} = \frac{53}{15} - \frac{12}{15} = \frac{41}{15}[/tex]
[tex]\frac{53}{15} = 3 \frac{8}{15}[/tex]
[tex]\frac{41}{15} = 2 \frac{11}{15}[/tex]
[tex]\frac{65}{15} + \frac{53}{15} + \frac{41}{15} = \frac{159}{15} = 10 \frac{9}{15} = 10 \frac{3}{5}[/tex]
5.
2 [tex]\frac{1}{2}[/tex]h = 2h 30min
3 [tex]\frac{1}{4}[/tex]h = 3h 15 min
3h 15min - 2h 30min = 45min
Odpowiedź: Harcerzom dojście do Przełęczy Bukowskiej zajmie 45 min mniej niż do Haliczy.
