Question

Write the name of this property 42+0 = 42

Answer 1

This is the Identity property of addition.  anything+0=that same number
Since adding 0 to a number still makes it the same number, its "identity" is still the same, thus the name.

Answer 2

That is the identiy Property of additon 

anthing times 0 is the same number 

hope this helps :)