Решебник по математике 6 класс Мерзляк ФГОС Задание 465

\[\boxed{\mathbf{465\ (465).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[80\ \frac{км}{ч = 80\ :60 = \frac{80}{60} = \frac{4}{3} =}\]

\[= 1\frac{1}{3}\ \frac{км}{мин.}\]

\[Ответ:1\frac{1}{3}\ \frac{км}{мин};\ \ \ \]

\[1333\frac{1}{3}\ \frac{м}{мин.}\]

\[\boxed{\mathbf{465}.}\]

\[1)\ 0,9x = 0,54\]

\[x = 0,54\ :0,9\]

\[x = 5,4\ :9\]

\[x = 0,6.\]

\[2)\ 9,2y = 3,68\]

\[y = 3,68\ :9,2\]

\[y = 36,8\ :92\]

\[y = 0,4.\]

\[3)\ 42,21\ :x = 4,2\]

\[x = 42,21\ :4,2\]

\[x = 4221\ :420\]

\[x = 10,05.\]