Решебник по математике 5 класс Ткачева рабочая тетрадь | Страница 58

\[\boxed{\mathbf{1.}}\]

\[\frac{2}{7};\ \ \frac{3}{5};\ \ \frac{5}{11};\ \ \ \frac{9}{100};\ \ \ \frac{17}{60};\ \ \ \frac{31}{60}.\]

\[\boxed{\mathbf{2.}}\]

\[1)\ \frac{2}{3}\ от\ 60:\]

\[60\ :3 \cdot 2 = 20 \cdot 2 = 40.\]

\[2)\ \frac{4}{5}\ от\ 70:\]

\[70\ :5 \cdot 4 = 14 \cdot 4 = 56.\]

\[3)\ \frac{4}{9}\ от\ 720\ кг:\]

\[720\ :9 \cdot 4 = 80 \cdot 4 = 320.\]

\[4)\ \frac{3}{8}\ от\ 240\ см:\]

\[240\ :8 \cdot 3 = 30 \cdot 3 = 90\ см.\]

\[\boxed{\mathbf{3.}}\]

\[1)\ 1600 \cdot 4 = 6400\]

\[2)\ \ 250\ :2 \cdot 5 = 125 \cdot 5 = 625\]

\[3)\ 210\ :3 \cdot 7 = 70 \cdot 7 = 490\]

\[\boxed{\mathbf{4.}}\]

\[1)\ \ 180\ т\ :2 \cdot 9 = 90\ т \cdot 9 =\]

\[= 810\ т\]

\[2)\ \ 520\ ц\ :5 \cdot 26 = 104 \cdot 26 =\]

\[= 2704\ ц\]

\[\boxed{\mathbf{5.}}\]

\[1\%\ от:\]

\[1)\ 7000:\]

\[7000\ :100 = 70\]

\[2)\ 35\ т = 35\ 000\ кг:\]

\[35\ 000\ кг\ :100 = 350\ кг\]