Odpowiedź:
[tex]a)\ \ 3\frac{1}{7}-1\frac{3}{7}=2\frac{8}{7}-1\frac{3}{7}=1\frac{5}{7}\\\\\\b)\ \ 4\frac{3}{11}-1\frac{5}{11}=3\frac{14}{11}-1\frac{5}{11}=2\frac{9}{11}\\\\\\c)\ \ 5\frac{2}{13}-2\frac{9}{13}=4\frac{15}{13}-2\frac{9}{13}=2\frac{6}{13}\\\\\\d)\ \ 5\frac{7}{19}-4\frac{16}{19}=4\frac{26}{19}-4\frac{16}{19}=\frac{10}{19}[/tex]
