Irrational number - Wikipedia, the free encyclopedia
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In mathematics, an irrational number is any real number that is not a rational number—that is, it is a number which cannot be expressed as a fraction m / n , where m and n are integers, with...
en.wikipedia.org/wiki/Irrational_number
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Sections: One-step equations, Multi-step equations, "No solution" and "all x" equations ... This solution could also be stated as "all real numbers" or "all reals" or "the whole number line"; expect some variation in lingo from one text to the next.
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www.purplemath.com/modules/solvelin3.htm
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Putting these two major classifications, the rationals and the irrationals, together in one set gives you the "real" numbers. Unless you have dealt with complex numbers (the numbers with an "i" in them, such as 4 – 3i), then every number you have ever seen has been a "real" number.
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www.purplemath.com/modules/numtypes.htm
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Without getting technical, real numbers are all numbers that can be written as a possibly never repeating decimal fraction. For example, all rational numbers are real. Their decimal representations do repeat. Decimal fractions whose representation do not repeat are irrational.
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www.math.utah.edu/~alfeld/math/numbers.html
www.math.utah.edu/~alfeld/math/numbers.html
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In this lesson we look at some properties that apply to all real numbers. If you learn these properties, they will help you solve problems in algebra. Let's look at each property in detail, and apply it to an algebraic expression.
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www.math.com/school/subject2/lessons/S2U2L1DP.html
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In pre-algebra, you learned about the properties of integers. Real numbers have the same types of properties, and you need to be familiar with them in order to solve algebra problems.
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www.math.com/school/subject2/lessons/S2U2L1GL.html
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[…] I know a respectable computer scientist who spends hours as an imaginary ensign aboard a virtual starship full of other real people around the world who pretend they are characters in a Star Trek adventure. I have three or four personae myself, ... Quite possibly the numbers need more interpretation -- for example,
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many.corante.com/archives/2006/12/12/second_life_what_a...
many.corante.com/archives/2006/12/12/second_life_what_are_the_real_numbers.php
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Note for math purists: In the strict axiomatic field development of the real numbers, both 0 and 1 are singled out for special treatment. Zero is the additive identity, because adding zero to a number does not change the number.
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www.jamesbrennan.org/algebra/numbers/real_number_system...
www.jamesbrennan.org/algebra/numbers/real_number_system.htm
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