Cześć!
a)
[tex]17:9=1 \ r \ 8\longrightarrow\frac{17}{9}=1\frac{8}{9}\\\\35:11=3 \ r \ 2\longrightarrow\frac{35}{11}=3\frac{2}{11}[/tex]
b)
[tex]3\frac{4}{7}=\frac{3\cdot7+4}{7}=\frac{21+4}{7}=\frac{25}{7}\\\\2\frac{4}{13}=\frac{2\cdot13+4}{13}=\frac{26+4}{13}=\frac{30}{13}[/tex]
c)
[tex]\text{liczba odwrotna do} \ \frac{8}{17} \ \text{to} \ \frac{17}{8} \ (2\frac{1}{8} \ \text{po uproszczeniu)}\\\\\text{liczba odwrotna do} \ 4\frac{3}{7} \ \text{to} \frac{7}{31} \ (\text{bo} \ 4\frac{3}{7}=\frac{4\cdot7+3}{7}=\frac{28+3}{7}=\frac{31}{7})[/tex]
