Respuesta :

A- -6-2=2-6
-4=-4
communicative

B-communicative
19-2=2-19
17=17
communicative

C- -7+-2=-9
closure

solution:

A- -6+(+2)

[tex] - 6 - 2[/tex]

[tex] = - 4[/tex]

commutative property.

B- 19+(-2)=(-2)+19

[tex] 19 - 2[/tex]

[tex] = 17[/tex]

commutative property.

C- -7+(-2)

[tex] - 7 - 2[/tex]

[tex] = - 9[/tex]

closure property.