Question

2. Calcule as adições.
a) (+8) + (-5) =
b) (+15) + (-3) =
c) (+10) + (-4) =
d) (-12) + (+20) =
e) (-30) + (+10)=​

Answer 1

Resposta:

a)(+8)-5

8-5=3

b)(15)-3=

15-3=12

c)(+10)+(-4)=(+10)-4=10-4=6

d)(-12)+20=-12+20=-8

e)(-30)+10=-30+10=-20