Question

Calcule o valor das expressões:

a) -10-{-2+[+1-(-3 -5) +3] }
b) { [2+(-15 -15)-2] }
c) { 30+[ 10-5+(-2-3) +3] }
d) {30+[10-5+(-2-3)] }

Answer 1

a) -10-{-2+[+1-(-3-5)+3]}
    -10-{-2+[+1-(-8)+3]}
    -10-{-2+[+1+8+3]}
    -10-{-2+[12]}
    -10-{-2+12}
    -10-{+10}
    -10-10
    $\boxed{=0}$


b) {[2+(-15-15)-2]}
    {[2+(-30)-2]}
    {[2-30-2]}
    {[-30]}
$\boxed{=-30}$

c) {30+[10-5+(-2-3)+3]}
    {30+[10-5+(-5)+3]}
    {30+[10-5-5+3]}
    {30+[+3]}
    {30+3}
    $\boxed{=33}$

d) {30+[10-5+(-2-3)]}
    {30+[10-5+(-5)]}
    {30+[10-5-5]}
    {30+[0]}
    {30}
    $\boxed{=30}$


BONS ESTUDOS!