Question

Me ajudem. (-20)+(+10)=

A- (+5)+(-2)=
B- (-22)+(+25)=
C- (-13)+(+13)=

D- (+4)-(+2)=
E- (+3)-(-9)=
F- (-20)-(+22)=
G- (-35)-(-55)=
H- (+45)-(-23)=
I - (+7).(-9)=
J- (+10).(+4)=
K- (-12).(-11)=
L- (+20).(-3)=
M- (-13).(-22)=
N- (+32).(+4)=

Answer 1

-10
a)3
b)3
c)0
d)2
e)12
f)-42
g)20
h)68
i)-63
j)40
k)132
l)-60
m)286
n)128