Pre-Algebra 15 - Least Common Denominators

The video tutorial by Professor Von Schmohawk at Why U explains how to find the least common denominator (LCD) for adding or subtracting fractions with different denominators. It introduces prime factorization as a method to determine the LCD, providing examples with fractions like 1/6 and 1/30, 1/6 and 1/18, and 1/30 and 1/42. The tutorial compares the LCD method with other techniques, highlighting its efficiency, especially when dealing with more than two fractions. The video concludes by emphasizing the importance of simplifying fractions after addition or subtraction.

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