\[\boxed{\mathbf{Страница\ 36.\ }\mathbf{Еуроки\ - \ ДЗ\ без\ мороки}}\]
\[\boxed{\mathbf{2.\ }}\]
\[\mathbf{1.}\]
\[15\ 030\ 000\ :500 =\]
\[= 150\ 300\ :5 = 30\ 060\]
\[\mathbf{2.}\]
\[600\ 040 - x = 31\ 472\]
\[x = 600\ 040 - 31\ 472\]
\[x = 568\ 568\]
\[Ответ:x = 568\ 568.\]
\[\mathbf{3.}\]
\[\textbf{а)}\ d\ :(c\ :8)\]
\[\textbf{б)}\ b - (m + 2 \cdot m)\ \]
\[\boxed{\mathbf{3.\ }}\]
\[\mathbf{Урок\ 21.\ Меры\ времени.\ Календарь}\]