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Factors are useful when you're trying to reduce fractions. Multiples are useful when you're trying to find a least common denominator.

Q: When is it useful to use factors and multiples?

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It is always useful to know about factors and multiples.

When taking algebra tests.

multiples: Least Common Multiple

Factors create multiples, multiples break down into factors.

the factors and multiples of 396 are 1,2,3,4,6,9,11,12,18,22,33,36,44,66,99,132,198,396

Factors: 1,2,3,6 Multiples: 6,12,18,24 and so on.

Factors go into numbers, numbers go into multiples. Divisibility shows what factors come out of what multiples.

Factors of the number will also be factors of the number's multiples. Multiples of the number will also be multiples of the number's factors.

Factors go into numbers, numbers go into multiples.

When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms.

The hcf is useful in reducing fractions to their lowest terms and the lcm is useful in finding the lowest common denominator of fractions that have different denominators that need to be added or subtracted.

Factors go into numbers, numbers go into multiples.