The additive identity of a number n is the number which, when added to n will yield n. In other words, when it is added to a number, the number remains the same. Under the whole numbers system and all of its supersets, the additive identity is zero. Number is the current mathematics collaboration of the week! Please help improve it to featured article standard. ... 3 + 2 with apples, a popular choice in textbooks Addition is the basic operation of arithmetic. ... Zero can refer to several things. ...

For example:

• The additive identity for 5 is 0, because 5 + 0 = 5. This is true for all numbers.

See also

• Additive inverse