Răspuns:
[tex]a = \frac{5}{1} \times \frac{3}{1} \\ = \frac{15 }{1} \\ = 15[/tex]
[tex]b = \frac{9}{1} \times \frac{5}{3} \\ = \frac{27}{3} \times \frac{5}{3} \\ = \frac{135}{3} = 45[/tex]
[tex]c = \frac{11}{1} \times \frac{4}{1} \\ = 44[/tex]
[tex]d = \frac{23}{4} \times \frac{1}{5} \\ = \frac{23}{20} [/tex]
[tex]f = \frac{28}{5} \times \frac{1}{21} \\ = \frac{28}{105} [/tex]
[tex]e = \frac{56}{3} \times \frac{1}{70} \\ = \frac{8}{3} \times \frac{1}{10} = \frac{4}{15} [/tex]
