The first new set of numbers we will consider is the integers. Integers The integers include positive and negative natural numbers and zero. Z = {.,...

The first new set of numbers we will consider is the integers. Integers The integers include positive and negative natural numbers and zero. Z = {. . ., -2, -1, 0, 1, 2, . . .} We can use a Venn Diagram to show the relationship between natural, whole, and integer numbers. Is the concept of a negative number really that natural or useful? Example Suppose I owe you $2. One might say that I have -$2. Is this natural?