document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=342514>Question 342514</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to know how to name the set or sets of numbers that each real number belongs to. I don't really know how to classify it. How would I know if it is an integer, whole number, real number, rational or irrational number and what is a natural number? And I am using square roots with these so the first question is negative square root of 20. So how do I classify that? For my answer I put integer, rational, and real number, but I don't even know what they mean. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #245175 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=245175\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-sqrt%2820%29 ALIGN=MIDDLE  ALT=\"-sqrt%2820%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > is a real number and it is an irrational number.\r<BR>\n" );
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document.write( "Here are some quick definitions:\r<BR>\n" );
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document.write( "Integer: Whole number (ie number with no decimal parts).\r<BR>\n" );
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document.write( "Natural number: Any whole number that is positive and not zero (eg: 1, 2, 3, 4...)\r<BR>\n" );
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document.write( "Rational Number: Number that can be written as a fraction of two integers.\r<BR>\n" );
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document.write( "Irrational Number: A number that CANNOT be written as a fraction of two integers.\r<BR>\n" );
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document.write( "Real Number: At the moment, it's pretty much any number you can think of. So every number is a real number (for now). You'll find on later in algebra that there are other types of numbers that are not real numbers.\r<BR>\n" );
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document.write( "If you need more help, email me at <a  rel=nofollow HREF=\"mailto:jim_thompson5910@hotmail.com?Subject=Algebra%20Help\">jim_thompson5910@hotmail.com</a>\r<BR>\n" );
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document.write( "Jim </SPAN>\n" );
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