Question

When adding like fractions,why is the numerator the only part of the fraction that changes?

Answer 1

Because youre adding parts of the fraction and not changing the amount of parts the fraction is divided in to.

Answer 2

well it depends on the problem. If the denominator isn't the same as the first fraction, then their will be a different number. But if its the same, than the numerator is the only part that will change because it adds on unto it..