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