--- loncom/homework/default_homework.lcpm	2014/06/24 17:02:33	1.165
+++ loncom/homework/default_homework.lcpm	2014/06/24 18:02:47	1.166
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.165 2014/06/24 17:02:33 raeburn Exp $
+# $Id: default_homework.lcpm,v 1.166 2014/06/24 18:02:47 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1045,6 +1045,18 @@ sub format_significant_figures {
     my $numSig = $xint*10**($x10-$sig+$power);
     if ($numSig =~ /^(\d+)\.(\d+)/) {
         # insert trailing zero's if have decimal point
+        my @digarray = split('',$1.$2);
+        my $sigcount;
+        while (@digarray > 0) {
+            my $item = shift(@digarray);
+            if ($item) {
+                $sigcount = 1 + @digarray;
+                last;
+            }
+        }
+        if (($sigcount) && ($sig >= $sigcount)) {
+            $zeros = substr($zeros,0,($sig - $sigcount));
+        }
         $numSig =~ s/^(\d+)\.(\d+)(\e?(.*)?)$/$1\.$2$zeros$3/;
     } else {
         if ($numSig =~ /0$/) {