Odpowiedź:
[tex]a)\ \ \frac{6}{0,5+0,1}\cdot6=\frac{6}{0,6}\cdot6=10\cdot6=60\\\\\\b)\ \ 9:\frac{0,27}{9}=9:0,03=300\\\\\\c)\ \ \frac{6+4}{6}\cdot\frac{8}{10+2}=\frac{10}{6}\cdot\frac{8}{12}=\frac{5}{3}\cdot\frac{2}{3}=\frac{10}{9}=1\frac{1}{9}\\\\\\d)\ \ \dfrac{5+3}{\frac{1}{\not2_{1}}\cdot\not8^4}:\dfrac{\frac{1}{\not3_{1}}\cdot\not6^2}{3+6}=\dfrac{8}{4}:\dfrac{2}{9}=\not2\cdot\frac{9}{\not2}=9[/tex]
