Obliczenia
[tex]\dfrac{-1,8\cdot\frac{2}{3}-0,8\cdot(-\frac{3}{4})^2}{-0,9\cdot\frac{5}{9}+(-\frac{1}{2})}=\dfrac{-0,6\cdot2-0,8\cdot\frac{9}{16}}{-0,1\cdot5-\frac{5}{10}}=\dfrac{-1,2-\frac{9}{20}}{-0,5-0,5}=\\\\\\=\dfrac{-1,2-\frac{45}{100}}{-1}=\dfrac{-1,2-0,45}{-1}=\dfrac{-1,65}{-1}=\boxed{1,65}[/tex]
