Respuesta :

1) associative
2) commutative
3)?
4) identity

Answer:

A + (B + C) = (A + B) + C  

associative  property

A + B = B + A  

commutative  property

A + (−A) = 0  

inverse property

A + 0 = A  

identity  property

Step-by-step explanation:

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