The closure property of rational numbers states that the sum (or difference or product) of two rational numbers is also a rational number.
If you provide specific sums you want evaluated, I can help determine which of them is a rational number based on the closure property. A rational number can be expressed in the form of \( \frac{a}{b} \), where \( a \) and \( b \) are integers and \( b \neq 0 \).
Please provide the sums you would like to evaluate!