Math chap 1

Natural number

a positive integer, often used for counting and ordering, starting from 1 (e.g., 1, 2, 3, …).

Whole number

A whole number is a non-negative integer, including zero, used for counting and ordering (e.g., 0, 1, 2, 3, …).

Intergers

whole numbers that can be positive, negative, or zero, used in various mathematical operations (e.g., -3, -2, -1, 0, 1, 2, 3).

Rational number

any number that can be expressed as fraction of two integers, with a non-zero denominator (e.g., 1/2, 3, -4) it is decimals that end or repeat.