Question

tính hợp ý : 19.85 + 15.19 - \(^{2^8}\): \(^{2^6}\).5

Answer 1

\(19.\left(85+15\right)-2^2.5\)

\(=19.100-4.5\)

\(=1900-20\)

\(=1880\)

Answer 2

`19 . 85 + 15 . 19 - 2^8 : 2^6 . 5`

`= 19 . 85 + 15. 19 - 2^2 . 5`

`= 19 . 85 + 15 . 19 - 4 . 5`

`= 19 . ( 85 + 15 ) - 20`

`= 19 . 100 - 20`

`= 1900 - 20`

`= 1880`

Answer 3

$19.85+15.19-2^8:2^6.5$

$=19.85+15.19-2^2.5$

$=19.85+15.19-4.5$

$=19.(85+15)-20$

$=19.100-20$

$=1900-20$

$=1880$