I think you are being a bit vague here as to how much you want to add and to which values, but I'd guess at something like this:
Code:
#!/bin/sh
INC=0.01
while read line
do
lineout=""
for num in $line
do
num=expr $num + $INC
if [ -z "$lineout" ]
then
lineout=$num
else
lineout="$lineout $num"
fi
done
echo "$lineout"
done
(Untested)
