\[\boxed{\mathbf{Страница}\mathbf{\ 15}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\mathbf{48}\mathbf{.}\mathbf{\ }}\]
\[119 - 4 \cdot 3 + 81\ :9 =\]
\[= 119 - 12 + 9 = 128 - 12 =\]
\[= 116\]
\[(119 - 4) \cdot 3 + 81\ :9 =\]
\[= 115 \cdot 3 + 9 = 345 + 9 = 354\]
\[119 - (4 \cdot 3 + 81\ :9) =\]
\[= 119 - (12 + 9) = 119 - 21 =\]
\[= 98\]
\[119 - 4 \cdot (3 + 81\ :9) =\]
\[= 119 - 4 \cdot 12 = 119 - 48 = 71\]
\[\boxed{\mathbf{49}\mathbf{.}\mathbf{\ }}\]