document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=909618>Question 909618</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I explain how I can use the Commutative and associative properties to add 19+28+81 mentally? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551962 by </B><A HREF=/tutors/aboutme.mpl?userid=JulietG><B>JulietG(1812)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JulietG><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=JulietG><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=551962\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You could group them this way:<BR>\n" );
document.write( "(19+81=100)+28 = 128 (associative)<BR>\n" );
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document.write( "81+19+28 = 1+9+8, carry the 1 mentally, 1+8+1+2 = 12.  12x + 8 = 128 (commutative)<BR>\n" );
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document.write( "The grouping is easier in this case. </SPAN>\n" );
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