That depends what it is to be added to.
One is added.
Another number added to a number is the sum (total) of the two numbers.
A number being added to another number is called an addend. The total of the numbers added together is called the sum.
An addend is a number or quantity to be added to another.
Any number may be added
When added to a rational number, any irrational number will produce an irrational number.also, when added to an irrational number, any rational number will produce an irrational number.
Any irrational number, when added to 13, will produce an irrational number.
5+x is 5 added to another number.
Another number added to a number is the sum (total) of the two numbers.
A natural number is doubled when added to its reciprocal. Find that number!
Two negative numbers added together result in a negative number.
Any irrational number, when added to 13, will produce an irrational number.