Question

resolva as expressões numéricas aplicando as regras de sinais quando necessário

a)-9+7=
b)+4+6=
c)+12+(-12)=
d)-7-(+10)=
e)0+(+8)=
f)+(-15)+(+6)=
g)-11-9=
h)-(-18)+(-22)=
i)+12-(-4)+(-7)=
j)-7+(+10)-(+5)=

Answer 1

Resposta:

a) -2

b) 10

c) 0

d) -17

e) 8

f) -9

g) -20

h) -4

i) 9

j) -2

Explicação passo-a-passo:

a)-9+7= -2

b)+4+6= +10

c)+12+(-12)= +12-12= 0  

d)-7-(+10)= -7-10 = -17

e)0+(+8)= 0+8 = 8

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

g)-11-9= -20

h)-(-18)+(-22)= +18-22= -4

i)+12-(-4)+(-7)= +12+4-7 = 9

j)-7+(+10)-(+5)= -7+10-5= -2