<PRE><B>Question 554578</B>
&amp;#8730;90-&amp;#8730;10


&amp;#8730;(9*10)-&amp;#8730;10


&amp;#8730;9*&amp;#8730;10-&amp;#8730;10


3*&amp;#8730;10-&amp;#8730;10


2*&amp;#8730;10



So &amp;#8730;90-&amp;#8730;10 = 2*&amp;#8730;10



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Jim</PRE>