Yes.
They make a rational number.
Any other rational number.
Any other rational number.
Any other rational number.
Any and every rational number.
They make a rational number.
Every rational number does.
Any rational number does.
Any rational number does.
Any rational number will do that.
Any other rational number.
Any other rational number.
Since the set of rational numbers is closed under addition, any rational number added to 0.5 will total another rational number.
Any other rational number.
Any other rational number.
Any and every rational number.
If an irrational number is added to, (or multiplied by) a rational number, the result will always be an irrational number.