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Chapter 7

Factors and Multiples

Factors and multiples are two key mathematical ideas that are both related to division. When one number is divisible by another number, the first number is a multiple of the second, and the second is a factor of the first. Calculating the factors and multiples of a number is essential for the more complicated math that follows, such as working with fractions, decimals, and percents (which are covered in Chapters 9 through 11).

The Problems You’ll Work On

The following are the types of problems to which you apply your math skills in this chapter:

Deciding whether one number is a factor of another number

Generating all the factors of a number

Finding the prime factors of a number

Discovering the greatest common factor (GCF) of two or more numbers

Listing the first few multiples of a number

Finding the least common multiple (LCM) of two or more numbers ...

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