MATH Preliminaries

# MATH Preliminaries - • Negative integers The numbers...

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Preliminaries Before you begin learning, relearning, or reviewing algebra, you need to feel comfortable with some  pre-algebra terms and operations. The first items you should become familiar with are the different  categories or types of numbers and the common math symbols. Categories of numbers In doing algebra, you work with several categories of numbers. Natural or counting numbers.  The numbers 1, 2, 3, 4, …are called  natural  or  counting numbers.   Whole numbers.  The numbers 0, 1, 2, 3, …are called  whole numbers.   Integers.  The numbers …–2, –1, 0, 1, 2, …are called  integers.
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Unformatted text preview: • Negative integers. The numbers …–3, –2, –1 are called negative integers. • Positive integers. The natural numbers are sometimes called the positive integers. • Rational numbers. Fractions, such as or , are called rational numbers. Since a number such as 5 may be written as , all integers are rational numbers. All rational numbers can be written as fractions , with a being an integer and b being a natural number. Terminating and repeating decimals are also rational numbers, because they can be written as fractions in this form....
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