Yes, but you cannot combine them.
Thus, 2x2 and 1/x can be added to give 2x2 + 1/x
but they cannot be combined into a single term.
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By finding their lowest common denominator
1. change the dissimilar fractions to similar fractions by getting the L.C.D or the least common denominator. 2. add the whole numbers and write down the given denominator. 3. reduce the answer to lowest term if possible.
Make the fractions equivalent then subtract
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By finding the lowest common multiple of the denominators.