Question

calcule no caderno:
a) (+5)+(+20)=
b) (+2)+(-12)=
c) (-15)+(+9)=
d)(-6)+0=
e)(-8)+(-10)=
f)(-9)+(+9)=
g)(+15)+(-15)=
h)0+(+20)=​

Answer 1

Explicação passo-a-passo:

a) (+5)+(+20)= +25

b) (+2)+(-12)= -10

c) (-15)+(+9)= -6

d)(-6)+0= -6

e)(-8)+(-10)= -18

f)(-9)+(+9)= 0

g)(+15)+(-15)= 0

h)0+(+20)= +20