you subtract the numerator but the denominator stays the same.
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I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.
No. To multiple fractions multiple the numerators together and multiply the denominators together and simplify (by dividing both numerator and denominator of the result by common factors until the only common factor is 1). The denominators only need to be the same when adding or subtracting fractions.
You divide the numerator by the denominator.
Divide the numerator by the denominator