A **rational number** can be written as a fraction $\frac{p}{q}$,

where $p$ and $q$ are integers and $q$ does not equal zero.

Integers, fractions, and repeating or terminating decimals are rational numbers.

**Whole numbers** are rational numbers greater than or

equal to zero that do not have a fraction or decimal {0, 1, 2, 3, ...}.

**Integers** are whole numbers and their opposites {..., -3, -2, -1, 0, 1, 2, 3, ...}.

**Natural numbers** are rational numbers greater than

zero that do not have a fraction or decimal.

Natural numbers are a subset of whole numbers.

All natural numbers are whole numbers.

Some, but not all, whole numbers are natural numbers.

Whole numbers are a subset of integers.

All whole numbers are integers.

Some, but not all, integers are whole numbers.

Integers are a subset of rational numbers.

All integers are rational numbers.

Some, but not all, rational numbers are integers.