document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133217>Question 1133217</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My son's teacher marked these wrong in his Math test. My understanding is she expected them to be written as subtraction equations even though it was not specifically mentioned in the test. So please help me understand.\r<BR>\n" );
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document.write( "1) <BR>\n" );
document.write( "Mr. Pickles owes $350 on his laptop. He has already paid $930 on it. What equation models determining the original cost of the laptop.\r<BR>\n" );
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document.write( "This is my son's equation which was marked as incorrect :<BR>\n" );
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document.write( "350 + 930 = c ; c = 1280\r<BR>\n" );
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document.write( "2) Katy has to sell some Girl scout cookies to her friends.If she sells 9 dozen she will have 24 dozen left. How many dozens does she have to begin with? \r<BR>\n" );
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document.write( "This is my son's equation which was marked as incorrect :<BR>\n" );
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document.write( "9 + 24 = d ; d = 33 dozen\r<BR>\n" );
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document.write( "What instructions in both questions points to them being  subtraction equations ?\r<BR>\n" );
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document.write( "Would greatly appreciate your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750391 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=750391\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ---------<BR>\n" );
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document.write( "1) <BR>\n" );
document.write( "Mr. Pickles owes $350 on his laptop. He has already paid $930 on it. What equation models determining the original cost of the laptop. <BR>\n" );
document.write( "This is my son's equation which was marked as incorrect :\r<BR>\n" );
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document.write( "350 + 930 = c ; c = 1280 <BR>\n" );
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document.write( "Let c be the original cost (or price) of the laptop.<BR>\n" );
document.write( "If Mr. P still OWES $350, and already paid  $930, then an equation using subtraction can be:   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c-930=350 ALIGN=MIDDLE  ALT=\"c-930=350\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  <BR>\n" );
document.write( "Also true can be this one, showing what what already paid:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c-350=930 ALIGN=MIDDLE  ALT=\"c-350=930\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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