§ Задание 536
\[\boxed{\mathbf{2.536}}\]
\[1)\ \frac{390}{650} = \frac{3}{5}\]
\[2)\ \frac{4550}{5550} = \frac{91}{111}\]
\[3)\ \frac{570}{13310} = \frac{57}{1331}\]
\[4)\ \frac{4200}{4550} = \frac{84}{91} = \frac{12}{13}\]
\[\boxed{\mathbf{2.536}}\]
\[1)\ \frac{390}{650} = \frac{3}{5}\]
\[2)\ \frac{4550}{5550} = \frac{91}{111}\]
\[3)\ \frac{570}{13310} = \frac{57}{1331}\]
\[4)\ \frac{4200}{4550} = \frac{84}{91} = \frac{12}{13}\]