Try this:

= A3-SUM(C1:C39)

Hope this helps.

Pete

On Dec 11, 12:55 pm, Dig wrote:
I have a number in a cell A3 and about 40 numbers in 40 other cells that I
want to subtract from the number in A3. I tried = A3-C1:C39 but that did not
work.

What is the easiest and correct way to perform this calculation?

Thanks