Odpowiedź:
[tex] \frac{1}{2} \times \frac{1}{6} = \frac{1}{12} [/tex]
[tex] \frac{1}{2} \times \frac{1}{3} = \frac{1}{6} [/tex]
[tex] \frac{1}{4} \times \frac{1}{5} = \frac{1}{20} [/tex]
[tex] \frac{1}{3} \times \frac{1}{7} = \frac{1}{21} [/tex]
W załączniku
