Answer with explanation:
The number in which we have to add a number to give irrational = 0.5

is a Rational Number as the decimal expansion terminates or denominator contains the number in the form of
.
→Sum of two Rationals Can't be a Irrational Number.
→Sum of Rational And Irrational is Irrational.
So, if you add any Irrational number like √2,π,∛2 to , 0.5 , it will give an Irrational Number.
⇒0.5 +Irrational Number=Irrational Number