Question

When fractions have the same denominator, their _____ also has the same denominator.

Answer 1

Equivalent fractions
hope this helps

Answer 2

For this case we have to, by definition:

The sum of fractions with the same denominator consists of adding the numerators and placing the same denominator.

For example:

$\frac {a} {b} + \frac {c} {b} = \frac {a + c} {b}$

So:

When fractions have the same denominator, their sum also has the same denominator.

Answer:

When fractions have the same denominator, their sum also has the same denominator.