Odpowiedź:
[tex]1\frac{2}{3}\cdot1,8+3\frac{5}{9}=\frac{5}{3}\cdot\frac{18}{10}+3\frac{5}{9}=\frac{90}{30}+3\frac{5}{9}=3+3\frac{5}{9}=6\frac{5}{9}\\[/tex]
