Calculation Error?

G

Guest

I have a spreadsheet that has 29 numbers with up to 2 decimal place precision
(44.29, 36.89, etc). I am taking the 1st number and subtracting the other 28
numbers from it
(=A1-B1-B2-B3-B4-B5-B6-B7-B8-B9-B10-B11-B12-B13-B14-C1-C2-C3-C4-C5-C6-C7-C8-C9-C10-C11-C12-C13-C14).
When I do this I get a result of 775,817.3700000010. My question is: where is
that 1 coming from in the 9th decimal place? I am displaying all of my 29
input numbers to 10 decimal places, and they are all 0's past the 2nd decimal
place. They are all entered as raw values (none are the result of a formula).

One other point: if I take out ANY of the 28 cells that are being
subtracted, the problem goes away - the 1 in the 9th decimal place becomes a
0.

I can send you the sample spreadsheet if that would help.
 

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