Question

8) Determine o valor das expressões: a) 25 -(8-5+ 3) - ( 12-5-8) = b) -4 + [ -3 + ( -5 + 9 - 2 )]​

Answer 1

Resposta:

A) $=20$

B) $=-5$

Explicação passo a passo:

A) $25-\left(8-5+3\right)-\left(12-5-8\right)$

$=25-6-\left(12-5-8\right)$

$=25-6-\left(-1\right)$

$=20$

B) $-4+\left[-3+\left(-5+9-2\right)\right]$

$=-4-1$

$=-5$