§ Задание 77
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{77}}\]
\[\textbf{а)}\ 6099 - 4379 + 2687 = 4407\]
\[\textbf{б)}\ 2454 + 3987 - 2592 = 3489\]
\[\textbf{в)}\ 4306 + 3091 - 2492 = 4905\]
\[\textbf{г)}\ 6303 - 2414 + 2839 = 5728\]
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{77}}\]
\[\textbf{а)}\ 6099 - 4379 + 2687 = 4407\]
\[\textbf{б)}\ 2454 + 3987 - 2592 = 3489\]
\[\textbf{в)}\ 4306 + 3091 - 2492 = 4905\]
\[\textbf{г)}\ 6303 - 2414 + 2839 = 5728\]