Pre-Algebra Lessons at Cool math .com - Greatest Common Factors (GCF) and Least Common Multiples (LCM)

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Greatest Common Factors and Least Common Multiples
(GCF's and LCM's)

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	Common Factors (Common Divisors)
	Greatest Common Factor (GCF) - also known as Greatest Common Divisor (GCD)
	Common Multiples
	Least Common Multiple (LCM) -- This is also how to find the Least Common Denominator which you'll need for fractions!

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