§ Задание 100
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{100}}\]
\[\textbf{а)}\ 7601 + 8939 < 17\ 000\]
\[7601 + 8939 < 8000 + 9000\]
\[7601 < 8000;\ \ 8939 < 9000.\]
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{100}}\]
\[\textbf{а)}\ 7601 + 8939 < 17\ 000\]
\[7601 + 8939 < 8000 + 9000\]
\[7601 < 8000;\ \ 8939 < 9000.\]