Odpowiedź:
[tex](2 \frac{3}{7} + 1 \frac{4}{6} ) - (5 \frac{6}{10} - 4 \frac{3}{5} ) = (2 \frac{3}{7} + 1 \frac{2}{3} ) - (5 \frac{3}{5} - 4 \frac{3}{5} ) = 2 \frac{9}{21} + 1 \frac{14}{21} - 1 = 3 \frac{23}{21} - 1 = 4 \frac{2}{21} - 1 = 3 \frac{2}{21} [/tex]
