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This module describes the concept of a real number. A vague, touchy feely definition of a real number is that a real number is a (signed) distance from a zero to any point on the number line:
Not needed for school students: the more strict definition of a real number, used by mathematicians, is that in the world of real numbers, any set of numbers that is limited from above, has a least upper bound that is a real number. See this article for details. Some real numbers are integers (1, -2, 0, 0), some are rational ( Algebra.Com is a people's math website. It relies on people, such as yourself, who create our content. All solvers and lessons are submitted by algebra.com's users. They retain copyright to their content, although they do grant rights to algebra.com. Creating lessons is easy! Look for other lessons and click on 'view source'. All you have to really know is mathematics. |
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