Question

which of these numbers is an integer?
-3.2
\frac{1}{2}
-\frac{1}{2}
0
integers can be whole numbers: 0, 1, 2, 3, …
integers can also be the opposites of whole numbers: -1, -2, -3, …

Explanation:

Step1: Recall integer definition

Integers include whole numbers (0, 1, 2, ...) and their opposites (-1, -2, -3, ...), and 0. Decimals (like -3.2) and fractions (like $\frac{1}{2}$, $-\frac{1}{2}$) are not integers.

Step2: Check each number

• -3.2: Decimal, not integer.
• $\frac{1}{2}$: Fraction, not integer.
• $-\frac{1}{2}$: Fraction, not integer.
• 0: Whole number, so integer.

Answer:

0