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Introduction to Prealgebra

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Natural numbers
the numbers used for counting and ordering
The set of whole numbers and their opposites.
a part of a whole
a number with one or more digits to the right of the decimal point
Negative number
a number less than zero
Integer factorization
the decomposition of a composite number into a product of smaller integers
an alphabetic character representing a number, called the value, which is either arbitrary or not fully specified or unknown. It is usually a letter like x or y.