\[Страница\ 70.\]
\[\boxed{\mathbf{58.}}\]
\[x \cdot 6 = 30\]
\[x = 5.\]
\[x \cdot 7 = 42\]
\[x = 6.\]
\[9 + x = 9\]
\[x = 0.\]
\[x - 12 = 0\]
\[x = 12.\]
\[\boxed{\mathbf{59.}}\]
\[Уменьши\ на\ 6:\]
\[17 - 6 = 11\]
\[9 - 6 = 3\]
\[11 - 6 = 5\]
\[48 - 6 = 42\]
\[24 - 6 = 18\]
\[Уменьши\ в\ 6\ раз:\]
\[42\ :6 = 7\]
\[36\ :6 = 6\]
\[12\ :6 = 2\]
\[30\ :6 = 5\]
\[\boxed{\mathbf{60.}}\]
\[1)\ 8 \cdot 3 = 24\ (пельменя) - мама\ \]
\[разложила\ по\ тарелкам.\]
\[2)\ 24 + 5 = 29\ (пельменей) -\]
\[было\ в\ кастрюле.\]
\[Ответ:29\ пельменей.\]
\[\boxed{\mathbf{61.}}\]
\[(7 + 9)\ :8 = 16\ :8 = 2\]
\[(19 + 8)\ :9 = 27\ :9 = 3\]
\[(60 - 4)\ :7 = 56\ :7 = 8\]
\[(42 - 36) \cdot 5 = 6 \cdot 5 = 30\]
\[54\ :(13 - 7) = 54\ :6 = 9\]
\[(39 - 30) \cdot 6 = 9 \cdot 6 = 54\]