Question

(+8)+(+5)= c)-2-4-1= d)(-8)+(-5)= e)12-7+3= f) (-3)+(+9)=​

Answer 1

(+8) + (+5)

8 + 5 = 13

C)

-2 -4 -1

- (2+4+1)

- (6+1) = 7

D)

(-8) + (-5)

-8 -5 = -13

E)

12 -7 +3

15 -7 = 8

F)

(-3) + (+9)

-3 +9 = 6

espero ter ajudado :D