In adding and subtracting fractions with unlike denominators, you have to get a least common denominator which is exactly like the least common multiple it just so happens to be in the denominator.
The least common multiple is the smallest number that two or more numbers will divide into evenly. This means that the LCM must contain all the prime factors of each number in question. Suppose we ...
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Least common denominator (LCD) think about it
In this video I will explain how to identify the least common denominator between two fractions and then between two rational expressions. We will use the same technique and understanding of factors ...
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