\[\boxed{\text{5.548.}}\]
\[30\ 803 - 402 = 30\ 401\]
\[54\ 944 + 202 = 55\ 146\]
\[101 - 101 = 0\]
\[20\ 040\ :2004 = 10\]
\[129\ 000\ :129 = 1000\]
\[1\ 000\ 000 - 1000 = 999\ 000\]
\[999\ 000 + 145 = 999\ 145\]
\[199\ 829\ :199\ 829 = 1\]