Use the LCM when you are adding and subtracting unlike fractions. Use the GCF when you are simplifying fractions.
multiples: Least Common Multiple
Factors create multiples, multiples break down into factors.
Common factors: 1 and 2 Common multiples: Any multiple of 132
Factors go into numbers, numbers go into multiples.
Factors are useful when you're trying to reduce fractions. Multiples are useful when you're trying to find a least common denominator.
you multiply them together
2 and 5 are the prime factors that are common to all multiples of 10.
1 and 2 are common factors. 84 and 168 are common multiples.
There are no greatest common multiples only greatest common factors
All numbers have common multiples.
Multiples of 5 and 10 are called common multiples.
You won't find common factors by using lists of multiples. The least common factor of any set of integers is 1, no matter what you use.