Question

3) calcule:

A) (+20)+(-5)=

B) (-100)+(+23)=

C) (-80)+(-7)=

D) (+57)+(+90)=

E)(-34)+(-89)=

F)(-78)+(-56)=​

Answer 1

Resposta:

a) +20 -5 = 15

b) -100 +23 = - 77

c) -80 -7 = - 87

d) +57 +90 = 147

e) -34 -89 = - 123

f) -78 -56 = - 134