Question

Qual o valor de expressão acima?

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Answer 1

$-( \frac{2^{-3}.2^5}{2^4} )=-( \frac{2^2}{2^4} )=-( \frac{4}{16} )=- \frac{1}{4}$

Outra forma de fazer:
$-( \frac{2^{-3}.2^5}{2^4} )=-( \frac{2^2}{2^4} )=-( 2^{-2} )=- \frac{1}{2^2}=- \frac{1}{4}$