Question

Tính hợp lý ( nếu có thể ):

( 25⁹ . 11 - 25² . 25⁷ ) : 25⁸

Answer 1

(25⁹.11 - 25².25⁷) : 25⁸

= (25⁹.11 - 25⁹) : 25⁸

= 25⁹.(11 - 1) : 25⁸

= 25.10

= 250

Answer 2

\(\left(25^9.11-25^2.25^7\right):28\)

\(=\left(25^9.11-25^9\right):25^8\)

\(=\left[25^9\left(11-1\right)\right]:25^8\)

\(=\left(25^9.10\right):25^8\)

\(=25^9:25^8.10\)

\(=25.10\)

\(=250\)

 

Answer 3

(25⁹.11 - 25².25⁷) : 25⁸

= ( 25⁹.11 - 25⁹) : 25⁸

= 25⁹. (11 - 1) : 25⁸

= 25⁹. 10 : 25⁸

= 25⁹ : 25⁸ . 10

= 25 . 10

= 250