Răspuns:
[tex] \frac{1}{5} \times \frac{1}{4} = \frac{1}{20} [/tex]
[tex] \frac{3}{7} \times \frac{2}{11} = \frac{6}{77} [/tex]
[tex] \frac{3}{8} \times \frac{5}{6} = \frac{1}{8} \times \frac{5}{2} = \frac{5}{16} [/tex]
[tex] \frac{5}{9} \times \frac{3}{4} = \frac{5}{3} \times \frac{1}{4} = \frac{5}{12} [/tex]
[tex] \frac{7}{15} \times \frac{5}{14} = \frac{1}{3} \times \frac{1}{2} = \frac{1}{6} [/tex]
[tex] \frac{5}{6} \times \frac{3}{20} = \frac{1}{2} \times \frac{1}{4} = \frac{1}{8} [/tex]
