Odpowiedź:
[tex] \frac{1}{2} \times \frac{5}{6} = \frac{5}{12} \\ \frac{10}{11} \times \frac{2}{15} = \frac{2}{11} \times \frac{2}{3} = \frac{4}{33} \\ \frac{4}{9} \times \frac{3}{20} = \frac{1}{3} \times \frac{1}{5} = \frac{1}{15} \\ 1 \frac{1}{6 } \times \frac{2}{7} = \frac{7}{6} \times \frac{2}{7} = \frac{1}{3} \times \frac{1}{1} = \frac{1}{3} [/tex]
