Odpowiedź:
a)
[tex] \frac{3 \times 9}{2} = \frac{27}{2} = 13.5[/tex]
b)
[tex] \frac{14 \times 7.5}{2} = 7 \times 7.5 = 52.5[/tex]
c)
[tex] \frac{4 \times 3.6}{2} = 2 \times 3.6 = 7.2[/tex]
d)
[tex] \frac{5 \times 9}{2} = \frac{49}{2} = 24.5[/tex]
