Inverse Property of Addition
Read this section on the properties of identity, inverses, and zero. Complete the practice questions and check your answers.
Inverse Property of Addition
Use the Inverse Properties of Addition and Multiplication
What number added to 5 gives the additive identity, 0?  
We know 

What number added to −6 gives the additive identity, 0?  
We know 
Notice that in each case, the missing number was the opposite of the number.
We call the additive inverse of . The opposite of a number is its additive inverse. A number and its opposite add to , which is the additive identity.
Source: Rice University, https://openstax.org/books/prealgebra/pages/74propertiesofidentityinversesandzero
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