document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1028411>Question 1028411</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could someone please check these and tell me if my answers are correct?  I would appreciate it very much, I don't feel confident with my answers!<BR>\n" );
document.write( "1) Find the sum of all of the 3-digit positive integers.<BR>\n" );
document.write( "my answer:  (999(99+1))/(2) - (99(99+1))/(2)<BR>\n" );
document.write( "            (999(1000))/(2) - (99(100))/(2)<BR>\n" );
document.write( "            (999(500)) - (99(50))<BR>\n" );
document.write( "            499500 - 4950 = 494550*****\r<BR>\n" );
document.write( "\n" );
document.write( "2)  Find the sum of every integer from 1 to 1000 that is not a perfect square.<BR>\n" );
document.write( "my answer:  ((1000)(1000+1))/(2)<BR>\n" );
document.write( "             (500)(1001)<BR>\n" );
document.write( "             500500***** </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #643517 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=643517\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) Find the sum of all of the 3-digit positive integers.<BR>\n" );
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document.write( "The sum from 100 to 999 = 900 integers<BR>\n" );
document.write( "Add 450 pairs:<BR>\n" );
document.write( "100 + 999 = 1099<BR>\n" );
document.write( "101 + 998 = 1099<BR>\n" );
document.write( "etc.<BR>\n" );
document.write( "450*1099 = 494550<BR>\n" );
document.write( "============================<BR>\n" );
document.write( "my answer:  (999(99+1))/(2) - (99(99+1))/(2)<BR>\n" );
document.write( "            (999(1000))/(2) - (99(100))/(2)<BR>\n" );
document.write( "            (999(500)) - (99(50))<BR>\n" );
document.write( "            499500 - 4950 = 494550*****<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "2)  Find the sum of every integer from 1 to 1000 that is not a perfect square.<BR>\n" );
document.write( "my answer:  ((1000)(1000+1))/(2)<BR>\n" );
document.write( "             (500)(1001)<BR>\n" );
document.write( "             500500*****<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "That's the sum of all integers.<BR>\n" );
document.write( "You have to subtract all the perfect squares.<BR>\n" );
document.write( "1,4,9,16, etc up to 961\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );