addendA number added to one or more other numbers to form a sum.
additive identityThe number 0 is called the additive identity because when you add it to a number, the result you get is the same number. For example, 4 + 0 = 4.
identity property of 0When you add 0 to any number, the sum is the same as the original number. For example, 55 + 0 = 55.
integersThe numbers …, -3, -2, -1, 0, 1, 2, 3…
rational numbersNumbers that can be written as the ratio of two integers, where the denominator is not zero.