Odpowiedź:
[tex]a)\ \ 1\frac{2}{3}:2\frac{1}{2}+9*1\frac{1}{6}=\frac{5}{3}:\frac{5}{2}+\not9^3*\frac{7}{\not6_{2}}=\frac{\not5}{3}*\frac{2}{\not5}+\frac{21}{2}=\frac{2}{3}+10\frac{1}{2}=\frac{4}{6}+10\frac{3}{6}=10\frac{7}{6}=11\frac{1}{6}\\\\\\b)\ \ (1\frac{1}{2})^2-1\frac{3}{5}:2\frac{2}{3}=(\frac{3}{2})^2-\frac{8}{5}:\frac{8}{3}=\frac{9}{4}-\frac{\not8}{5}*\frac{3}{\not8}=\frac{9}{4}-\frac{3}{5}=\frac{45}{20}-\frac{12}{20}=\frac{33}{20}=1\frac{13}{20}[/tex]
