\[\boxed{\text{71.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[= (39\ 000 + 212\ 000)\ :100 =\]
\[= 251\ 000\ :100 = 2\ 510.\]
\[= 54\ 000 - 252\ 000\ :10 =\]
\[= 54\ 000 - 25\ 200 = 28\ 800.\]
\[= 752 \cdot 30 = 22\ 560.\]