Odpowiedź:
[tex]a) \: \frac{14}{14} - \frac{3}{14} = \frac{11}{14} \\ \frac{9}{9} - \frac{7}{9} = \frac{2}{9} [/tex]
[tex]b) \: 2 \frac{11}{4} - \frac{1}{4} = 2 \frac{3}{4} \\ 4 \frac{7}{7} - \frac{5}{7} = 4 \frac{2}{7} [/tex]
[tex]c) \: 2 \frac{13}{9} - \frac{7}{9} = 2 \frac{6}{9} = 2 \frac{2}{3} \\ 1 \frac{19}{12} - 1 \frac{11}{12} = \frac{8}{12} = \frac{2}{3} [/tex]
