Odpowiedź:
a)
[tex]1 - \frac{4}{7} = \frac{7}{7} - \frac{4}{7} = \frac{3}{7} [/tex]
b)
[tex]12 \frac{5}{7} - 4 \frac{4}{7} = 12 \frac{5}{7} - 4 \frac{4}{7} = 8 \frac{1}{7} [/tex]
c)
[tex]32 \frac{5}{8} - 11 \frac{7}{8} = 31 \frac{13}{8} - 11 \frac{7}{8} = 20 \frac{6}{8} = 20 \frac{3}{4} [/tex]
