7. Central portion of the numberline near 0
Pluses and minuses
The integers is the name applied to the set of all whole numbers,positive negative, and zero. This set, often symbolized by the letter Z, is therefore infinite in both directions:
{…-4,-3,-2,-0,1,2,3,4,…}.
The integers are often pictured as lying at equally spaced points along a horizontal number line, in the order indicated. The additional rules that we need to know in order to do arithmetic with the integers can be summarized as follows:
