Question

Efectuați:
a) (-7)+(+3)=;
d) (-3)+(+12) = ;
g) (+13)+(-2) =;
j) (+7)H-13)=;
b) (-9)+(+5) = ;
e) (-8)+(+9) = ;
h) (+9)+(4) = ;
k) (+5)+(-5) =;
c) (-12)+(+7)=;
f) (-7)+(+7) = ;
i) (+20)+(-18) = ;
1) (+12)+(-13) = .​

Answer 1

a) (-7)+(+3)= - 7+3= -4

d) (-3)+(+12) = - 3+12 = 9

g) (+13)+(-2) = 13-2 = 11

j) (+7)-13)= 7-13 = - 6

b) (-9)+(+5) = -9 + 5 = - 4

e) (-8)+(+9) = - 8 + 9 = 1

h) (+9)+(4) = 9+4 = 13

k) (+5)+(-5) = 5-5=0

c) (-12)+(+7)= - 12 + 7 = - 5

f) (-7)+(+7) = - 7+7=0

i) (+20)+(-18) = 20-18 = 2

1) (+12)+(-13) = 12-13 = - 1