ГДЗ по математике 5 класс Мерзляк ФГОС Задание 691

\[\boxed{\ \mathbf{691\ (691)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 42\ :\frac{1}{2} = 42 \cdot 2 = 84\]

\[2)\ 42\ :\frac{1}{5} = 42 \cdot 5 = 210\]

\[3)\ 42\ :\frac{2}{3} = 42 \cdot \frac{3}{2} = 42\ :2 \cdot 3 =\]

\[= 21 \cdot 3 = 63\]

\[4)\ 42\ :\frac{3}{7} = 42 \cdot \frac{7}{3} = 42\ :3 \cdot 7 =\]

\[= 14 \cdot 7 = 98\]

\[5)\ 42\ :\frac{7}{11} = 42 \cdot \frac{11}{7} =\]

\[= 42\ :7 \cdot 11 = 6 \cdot 11 = 66\]

\[6)\ 42\ :\frac{21}{23} = 42 \cdot \frac{23}{21} =\]

\[= 42\ :21 \cdot 23 = 2 \cdot 23 = 46\]

\[\boxed{\mathbf{691}.}\]

\[1)\ 27 = 3 \cdot 3 \cdot 3\]

\[2)\ 56 = 2 \cdot 2 \cdot 2 \cdot 7\]

\[3)\ 98 = 2 \cdot 7 \cdot 7\]

\[4)\ 88 = 2 \cdot 2 \cdot 2 \cdot 11\]