Question

expressãoes com números inteiros relativo:? me ajundem e pra amanhã

a) -4+[-3+(-5+9-2)]=

b) -6-[10+[-8-3-1]=

c) -8-[-2-(-12)+3]=

d) 25- {-2+[6+(-4-1)]} =

e) 17- {5-3+[8- ( - 1 - 3 ) + 5 ] } =​

Answer 1

$a) -4+[-3+(-5+9-2)]=$

$-4+[ -3+ (4-2)]$

$-4+[-3+2]$

$-4 + [-1]$

$-4-1$

$-5$

$b) -6-[10+[-8-3-1]=$

$-6-[10+[-11-1]$

$-6-[10+[-12]$

$-6-[10-12]$

$-6-[-2]$

$-6+2$

$-4$

$c) -8-[-2-(-12)+3]=$

$-8-[-2+12+3]=$

$-8-[10+3]$

$-8- 13$

$-21$

$d) 25- [-2+[6+(-4-1)]] =$

$25- [-2+[6+(-5)]]$

$25 - [-2+[6-5]$

$25-[-2+ 1]$

$25-[-1]$

$25+1$

$26$

$e) 17-[5-3+[8- ( - 1 - 3 ) + 5 ] ] =$

$17 - [5-3+[8-(-4)+5]]$

$17-[5-3+[8+4+5]$

$17-[5-3+[12+5]$

$17-[5-3+17]$

$17-[2+17]$

$17-19$

$-2$