\[\boxed{\mathbf{1.}\mathbf{11}}\]
Пояснение.
Решение.
\[\textbf{а)}\ 5 \cdot 100 = 500\]
\[5\ :0,01 = 500\]
\[6 \cdot 1000 = 6000\]
\[6\ :0,001 = 6000\]
\[\textbf{б)}\ 2000\ :1000 = 2\]
\[2000 \cdot 0,001 = 2\]
\[30\ 000\ :10\ 000 = 3\]
\[30\ 000 \cdot 0,0001 = 3\]