§ Задание 140
\[\boxed{\mathbf{3.}\mathbf{140}}\]

\[= 38\ 231 - 0 = 38\ 231\]

\[384 - 201 - 183 =\]
\[= 384 - (201 + 183) =\]
\[= 384 - 384 = 0\]
\[\textbf{б)}\ (2839 - 939) \cdot (577\ :577) =\]
\[= 1900 \cdot 1 = 1900\]
\[\boxed{\mathbf{3.}\mathbf{140}}\]

\[= 38\ 231 - 0 = 38\ 231\]

\[384 - 201 - 183 =\]
\[= 384 - (201 + 183) =\]
\[= 384 - 384 = 0\]
\[\textbf{б)}\ (2839 - 939) \cdot (577\ :577) =\]
\[= 1900 \cdot 1 = 1900\]