Answer:
The Inverse Property of Addition states that
: The sum of a real number and its additive <em>inverse</em> is <em>zero</em>, the additive <em>module</em>.
Step-by-step explanation:
From the Algebra of Real Numbers we know that the Inverse Property of Addition, also know as Existence of Additive Inverse states that for all real number
exist only a real number
so that:

Where
and
is also known as additive module.
Therefore, we can complete the phrase below:
The Inverse Property of Addition states that
: The sum of a real number and its additive <em>inverse</em> is <em>zero</em>, the additive <em>module</em>.