§ Задание 13
\[\boxed{\mathbf{2}\mathbf{.}\mathbf{13}}\]

\[\textbf{а)}\ 84 = 80 + 4\]
\[\textbf{б)}\ 207 = 200 + 7\]
\[\textbf{в)}\ 38\ 407 =\]
\[= 30\ 000 + 8000 + 400 + 7\]

\[\boxed{\mathbf{2}\mathbf{.}\mathbf{13}}\]

\[\textbf{а)}\ 84 = 80 + 4\]
\[\textbf{б)}\ 207 = 200 + 7\]
\[\textbf{в)}\ 38\ 407 =\]
\[= 30\ 000 + 8000 + 400 + 7\]
