Răspuns:
[tex]a) \: \frac{2}{5} \times \frac{6}{7} = \frac{12}{35} \\ \\ b) \: \frac{11}{12} \times \frac{3}{35} = \frac{33}{420} = \frac{11}{140} \\ \\ c) \: \frac{1}{21} \times \frac{31}{55} \times \frac{11}{23} \times \frac{7}{2} = \frac{7}{1610} = \frac{1}{230} [/tex]
[tex]d) \: \frac{321}{3} \times \frac{25}{4} = \frac{25}{24} \\ \\ e) \: \frac{101}{15} \times \frac{36}{202} = \frac{12}{10} = \frac{6}{5} \\ \\ f) \: \frac{210}{9} \times \frac{8}{315} = \frac{560}{945} = \frac{112}{189} = \frac{16}{27} [/tex]
