Chapter R - Review of Basic Concepts - R.2 Real Numbers and Their Properties - R.2 Exercises - Page 19: 2

integers

RECALL: Integers are the number $0, 1, 2, 3, 4, ...$ and $-1, -2, -3, ...$ The set of integers contains all the whole numbers and their negative counterparts. Thus, the missing expression in the given statement is $\underline{\text{integers}}$.