This is not YOUR problem; it results from the way computer convert decimal
numbers to binary.
See Excel IEEE error http://support.microsoft.com/kb/78113
Your solution is =ROUND(A1-B1, 10 ) to get 1.0750000000

by the way: what do you mean by "I have starting values in the first column
with maximum two significant figures"
The value 2.875 has 4 sig fid (or 3 decimal places) while 95.15 has 4 sig
figs (but 2 decimal places)

"Sig figs" is NOT a synonym for "number of decimal places"

Forgive an old professor!
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email

"ornithology 1" wrote in message
...
Suddenly I have started problem with simple calculations (addition and
subtraction). I have starting values in the first column wtih maximum two
significant figures. I then perform a few operations (addition and
subtraction) using numbers from a previous operation(s) for a following
operation. For instance, 1) the original value, 2.875, 2) 100-2.875, then
3)
the answer from 2) - 95.15. The final answers should be exactly 1.075,
but
when I extend a number of decimal places, the value has a small value
either
added or subracted from the supposed to be answers. For example, instead
of
1.075, it shows 1.0750000000001200. I have tried to correct this error
without any success. Does anyone have any idea how to correct this
problem?


none