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What is the meaning dissimilar fraction?
They are fractions that have different denominators as for instance 3/4 and 5/8 are dissimilar fractions.
What is a dissimilar fractions?
Dissimilar fractions are fractions that have different denominators.
How do I find a common denominator in a fraction?
By finding the lowest common multiple of the denominators
Why it is necessary to have common denominators when adding or subtracting rational expressions?
Without such denominators, the addition makes no sense, because you're adding different "sizes" of fraction, per se. Think of it like trying to add 5 feet and 5 inches without converting, and saying the whole thing equals 10 feet. 5 inches clearly are not the same as 5 feet (they aren't even half a foot).
How are common multiples and common denominators the same and different?
Common multiples and common denominators can be found using the same process. They differ in their function. Common denominators are common multiples that are functioning as denominators.
