(259.11 - 252.257) : 258
= (259.11 - 259) : 258
= 259.(11 - 1) : 258
= 25.10
= 250
\(\left(25^9.11-25^2.25^7\right):28\)
\(=\left(25^9.11-25^9\right):25^8\)
\(=\left[25^9\left(11-1\right)\right]:25^8\)
\(=\left(25^9.10\right):25^8\)
\(=25^9:25^8.10\)
\(=25.10\)
\(=250\)
(259.11 - 252.257) : 258
= ( 259.11 - 259) : 258
= 259. (11 - 1) : 258
= 259. 10 : 258
= 259 : 258 . 10
= 25 . 10
= 250