[tex]\left(-3\dfrac{1}{3}-2\dfrac{2}{3} \right)\cdot \left(-3\dfrac{3}{4}\right) = \left(-\dfrac{10}{3}-\dfrac{8}{3} \right)\cdot \left(-\dfrac{15}{4}\right) =-\dfrac{18}{3} \cdot \left(-\dfrac{15}{4}\right)
=6\cdot\dfrac{15}{4}={\dfrac{90}{4}^{(2}}=\dfrac{45}{2} = 22,5[/tex]
