LCD means lowest common denominator which is needed when adding or subtracting fractions that have different denominators.
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In math, the LCD means the Lowest Common Denominator.
the lcd is the least common denominator but the LCM is the least common multiple.
least (or lowest) common denominator
The least common denominator, or LCD, is the smallest positive integer that all the members of a given set of denominators will divide into evenly with no remainder.
LCD:Lowest Common Denominator GCF:Greatest Common Factor