Question

determine o valor de cada soma algébrica

A) 2+(2+5-7)

B) -5+(2-4)-(7-1)

C) (-5+3)-(5-9)+(8-1)-11​

Answer 1

Resposta: -13

$A) 2+(2+5-7)$

$2+0$

$2$

$B) -5+(2-4)-(7-1)$

$(-5) + (-8)$

$-13$

$C) (-5+3)-(5-9)+(8-1)-11$

$-2-(-4)+7-11$

$-2+4-4$

$-2$