Question

which number stays the same when adding or subtracting fractions with like denominators? a. denominator b. numerator

Explanation:

When adding or subtracting fractions with like denominators, the rule is to add or subtract the numerators and keep the denominator the same. For example, $\frac{2}{5} + \frac{1}{5} = \frac{2 + 1}{5}=\frac{3}{5}$ and $\frac{3}{4}-\frac{1}{4}=\frac{3 - 1}{4}=\frac{2}{4}$. So the denominator remains unchanged while the numerator changes (is added or subtracted).

Answer:

A. Denominator