Odpowiedź:
[tex]7*2\frac{1}{2} = \frac{7}{1} * \frac{5}{2} = \frac{7*5}{1*2} = \frac{35}{2} = 17\frac{1}{2}[/tex]
7 * 2 i 1/2 = 7 * 5/2 = 35/2 = 17 i 1/2
