The Nature of Mathematics, 12th Edition
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Chapter 5
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Section 5.4: Rational Numbers

5.4 Outline

A.  Introduction
     1. definition of a rational number
     2. numerator
     3. denominator
     4. classification
         a. proper fraction
         b. improper fraction
         c. whole number
B. Fundamental property
C. Operations with rationals
     1. addition
     2. subtraction
     3. multiplication
     4. division

5.4 Essential Ideas

This section, which may be review, is concerned with the rational numbers (fractions) and operations with rational numbers. You must remember the definition of a rational number, the fundamental property of fractions (how to reduce a rational number):

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