Question

bài 1:

a) 2017+5.\(\left[{}\begin{matrix}\\\end{matrix}\right.\)300-( 17-7)² \(]\)

b) 5²⁷.5.5²⁵-\(|\)-125\(|\)

c) (5²⁵.18+ 5¹⁵.7) : 5¹⁷

Answer 1

a) 2017 + 5.[ 300 - \(\left(17-7\right)^2\)]

= 2017 + 5.[ 300 - \(10^2\)]

= 2017 + 5.[ 300 - 100]

= 2017 + 5. 200

= 2017 + 1000

= 3017

b) \(5^{27}\).5.\(5^{25}\)--125

= \(5^{27}\). 5 . \(5^{25}\) - 125

= \(5^{53}\) - 125

= \(5^{53}\) - \(5^3\)

= \(5^{53}\)+ 3

c) (\(5^{25}\).18+ \(5^{15}\).7) : \(5^{17}\)

= [ (\(5^{25}\) . \(5^{15}\)) . ( 18 . 7) ] : \(5^{17}\)

= [ \(5^{40}\) . 126 ] : \(5^{17}\)

= [ \(5^{40}\) : \(5^{17}\) ] . 126

= \(5^{23}\) . 126

Phần c) chưa chắc làm đúng nha

Học tốt :'3