Question

Efetue:
a) (+8)-(+7)
b) (-5)-(+5)
c) (-30)-(+70)
d) (-72)-(+30)
e)(-37)-(+20)
f) (+80)-(-15)
g) (+8)+(-7)+(-3)
h)(+2)+(-8)+(+9)+(10)
i)(-4)+(12)+(-13)+(-47)

Answer 1

a) (+8)-(+7) = 8 . 7 = 1 
b) (-5)-(+5) = -5 - 5 = -10
c) (-30)-(+70)  = -30 . 70 = -100
d) (-72)-(+30) = -72 - 30 = -102
e)(-37)-(+20) = -37 - 20 = -57
f) (+80)-(-15) = 80 + 15 = 95
g) (+8)+(-7)+(-3) = 8 - 7 - 3 = -2
h)(+2)+(-8)+(+9)+(10) = 2 - 8 + 9 + 10 = 13 
i)(-4)+(12)+(-13)+(-47) = -4 + 12 - 13 - 47 = -52 

Answer 2

A)(+8)-(+7)= 8-7=-1
B)(-5)-(+5)=-5-5=-10
C)(-30)-(+70)=-30-70=-100
D)(-72)-(+30)=-72-30=-102
E)(-37)-(+20)=-37-20=-57
F)(+80)-(-15)=+80+15=+95
G)(+8)+(-7)+(-3)=+8-7-3=+8-10=-2
H)(+2)+(-8)+(+9)+(+10)=+2-8+9+10=-6+19=-13
I)(-4)+(12)+(-13)+(-47)=-4+12-13-47=-8-13=-21
Espero q esteja certo