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Earn +20 ptsQ: Fractions can be added and subtracted only if they're fractions.?
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What is the definition of unlike fractions?
That simply means that the fractions have different denominators. Such fractions cannot be directly added, subtracted, or compared; you have to convert them to a common denominator first.
What happens when you have two fractions that have the same denominator?
Nothing actually happens. You are now in a position where the fractions may be added or subtracted more easily but that is all.
Why can't fractions with two different denominators be added or subtracted?
Because God made it so O.o
How do you change fractions into like terms?
When the denominators of two or more fractions are the SAME, then they can be added or subtracted directly. An easy way is to multiply each denominator by the other (along with its corresponding numerator).
How do you find LCD in fraction?
By finding the lowest common multiple of the fractions with different denomiators that need to be added or subtracted
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