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http://alex.state.al.us/lesson_view.php?id=11762

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http://www.softschools.com/math/classifying_numbers/

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https://www.quia.com/rr/104833.html

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http://www.onlinemathlearning.com/rational-irrational-numbers-games.html

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https://quizlet.com/1410303/real-number-system-flash-cards/

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http://staff.argyll.epsb.ca/jreed/math9/strand1/munchers.htm

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http://www.mathopenref.com/real-number.html

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click here

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http://www.virtualnerd.com/pre-algebra/real-numbers-right-triangles/real-and-irrational/define-real-numbers/real-number-definition

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https://www.mathsisfun.com/games/index.html

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click around for more links to games, websites, and videos to learn about the real number system

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click around for more links to games, websites, and videos to learn about the real number system

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https://www.mathsisfun.com/numbers/real-numbers.html

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The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers, such as √2 (1.41421356…, the square root of 2, an irrational algebraic number). Included within the irrationals are the transcendental numbers, such as π (3.14159265…).