Question

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

Answer 1

Resposta:

a)- 3

b)12

c) 6

d)- 8

e) -20