Question

Làm phép tính :

a) ( 5²³. 5¹⁸ ) : 5^{39 -} 5⁰ . 0⁵

^{b)[2.3mũ 3 + 144: (7mũ 2 - 925: 5 mũ 2 )]. gttđ của -8}

Answer 1

a)\(\left(5^{23}.5^{18}\right):5^{39}-5^0.0^5\)

= \(5^{41}:5^{39}-1.0\)

= \(5^2-0\)

= \(25-0=25\)

b)\(\left[2.3^3+144:\left(7^2-925:5^2\right)\right].\left|-8\right|\)

= \(\left[2.27+144:\left(49-925:25\right)\right].8\)

= \(\left[54+144:\left(49-37\right)\right].8\)

= \(\left[54+144:12\right].8\)

= \(\left[54+12\right].8\)

= \(66.8\)

= 528