Question

12-Calcule:
a)(-5)+(+2)-(-1)+(-7)=
b)(+2)-(-3)+(-5)-(-9)
c)(-2)+(-1)-(-7)+(-4)=
d)(-5)+(-6)-(-2)+(-3)=
e) (+9)-(-2) + (-1)-(-3)=
f) (-3).(+2).(-4).(+1).(-5) =
g) (-1).(-2).(-3).(-4).(-5) =
h) (-2).(-2).(-2).(-2).(-2).(-2)​

Answer 1

Resposta:

a) =1

b)9

c)0

d)-12

e)13

f)-120

g)-120

h)8

Explicação passo-a-passo:

[+com+ =+/{+ com - = -}/ - com - = +]

a)(-5)+(+2)-(-1)+(-7)= -5+2+1-7

=>8-7

=1

b)(+2)-(-3)+(-5)-(-9)=2+3-5+9

=>5-5+9

=9

c)(-2)+(-1)-(-7)+(-4)=-2 -1+7-4

=>-7+7

=0

d)(-5)+(-6)-(-2)+(-3)=-5-6+2-3

=> -14+2

= -12

e) (+9)-(-2) + (-1)-(-3)=9+2-1+3

=>14-1

= 13

f) (-3).(+2).(-4).(+1).(-5) =-6.-4.-5

=>24.(-5)

= -120

g) (-1).(-2).(-3).(-4).(-5) =2.12.(-5)

=>24.(-5)

=-120

h) (-2).(-2).(-2).(-2).(-2).(-2)= 2.2.2

=>4.2

=8