\[\boxed{\text{Страница}\text{\ 39.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[115.\]
\[Да.\]
\[Да.\]
\[Нет.\]
\[Да.\]
\[Нет.\]
\[116.\]
\[200 \cdot (75 + 25)\ :100\ :20 = 10\]
\[4000\ :(1000\ :500) \cdot 5 = 10\ 000\]
\[30 \cdot 30\ :100 \cdot 9 = 81\]
\[650 - 50 \cdot 2 \cdot 5 = 150\]
\[117.\]
\[87\ 542\ \ и\ \ 24\ 578:\]
\[118.\]