Use the LCM when you are adding and subtracting unlike fractions. Use the GCF when you are simplifying fractions.
becasu multiples are the same thing as factors.
multiples: Least Common Multiple
Factors create multiples, multiples break down into factors.
Common factors go into the numbers, the numbers go into common multiples.
Common factors: 1 and 2 Common multiples: Any multiple of 132
Factors go into numbers, numbers go into multiples.
you multiply them together
Factors are useful when you're trying to reduce fractions. Multiples are useful when you're trying to find a least common denominator.
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.
The common factors are 1, 3, 5 and 15. The common multiples are any multiple of 150.
There are no greatest common multiples only greatest common factors