## Thinking Mathematically (6th Edition)

$1 \div 4 = \frac{1}{4}$ 1 and 4 are integers, but $\frac{1}{4}$ is not.
Integers are not closed with respect to division as can be seen in the example below: 1 and 4 are integers. However, $1 \div 4 = \frac{1}{4}$, which is not an integer.