Chef Henri is very particular about where
he gets the ingredients for his recipes. For instance, for eggs,
he will only buy from two specific farmers, Monsieur Egblanc
and Monsieur Egbrun. One day, he purchases 4 dozen eggs from
M. Egblanc and no eggs from M. Egbrun. How many eggs did Chef
Henri buy that day?
Of course, the answer to that is 4 dozen eggs because 4 + 0 =
4.
This illustrates the Additive
Identity Property of Zero.
Zero
is called the additive
identity because adding zero to
any number doesn't change that number's value. Therefore, the
number keeps its identity. 
