Odpowiedź:
A)
[tex]1 \frac{3}{4} + 2 \frac{4}{7} = 1 \frac{21}{28} + 2 \frac{16}{28} = 4 \frac{9}{28} [/tex]
B)
[tex]5 \frac{2}{5} - 3 \frac{5}{7 } = 5 \frac{14}{35} - 3 \frac{25}{35} = 1 \frac{24}{35} [/tex]
