Column A numbers 10 rows down - clear? Column B, a number... smaller than
its A column number: A1 - B1 - clear? Column C says, =A1-B1. Problem, I do
not want to do this step "10 times" - A2-B2, A3-B3. Suggestion - Copy column
A & B into column C and adding the = sign. Me don't know how? You know how?

How would you frame the wording into a searchable subject? Type in your
search words and I get your answer or close to it. In short, what am I
talking about?
I don't know?
Portland, Oregon