Final answer:
The number 1/2 belongs to the categories of natural number, whole number, integer, and rational number in mathematics.
Step-by-step explanation:
The number 1/2 belongs to the following categories:
- Natural number
- Whole number
- Integer
- Rational number
A natural number is a positive whole number, so 1/2 is not a natural number. A whole number includes zero, so 1/2 is not a whole number. An integer includes both positive and negative whole numbers, so 1/2 is not an integer. However, 1/2 can be expressed as a fraction, so it is a rational number.