Number and Operations
Integers, Odd and Even Numbers, Prime Numbers, Digits
Integers: . . . , –4, –3, –2, –1, 0, 1, 2, 3, 4, . . .
(Note: zero is neither positive nor negative.)
Consecutive Integers: Integers that follow in sequence; for example, 22, 23, 24, 25. Consecutive integers can be more generally represented by n, n +1, n + 2, n + 3, . . .
Odd Integers: . . . , –7, –5, –3, –1, 1, 3, 5, 7, . . . , 2k + 1, . . . , where k is an integer
Even Integers: . . . , –6, –4, –2, 0, 2, 4, 6, . . . , 2k, . . . , where k is an integer
(Note: zero is an even integer.)
Prime Numbers: 2, 3, 5, 7, 11, 13, 17, 19, . . .
(Note: 1 is not a prime and 2 is the only even prime.)
Digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Note: the units digit and the ones digit refer to the same digit in a number. For example, in the number 125, the 5 is called the units digit or the ones digit.)
