\[\boxed{\mathbf{3.}\mathbf{164}\mathbf{.}\mathbf{ОК\ ГДЗ - домашка\ на\ }5}\]
\[10\ 000\ :16 = 625\]
\[\textbf{а)}\ 625 \cdot 16 = 10\ 000\]
\[\textbf{б)}\ 100\ 000\ :625 = 160\]
\[\textbf{в)}\ 1\ 000\ 000\ :625 = 1600\]
\[\textbf{г)}\ 160 \cdot 6250 = 1\ 000\ 000\ \]