There's a problem with this formula.Not trying to type a formula?When the first character is an equal (=) or minus (-) sign, ...

There's a problem with this formula.Not trying to type a formula?When the first character is an equal (=) or minus (-) sign, Excel thinks it's a formula:• you type:   =1+1, cell shows:   2To get around this, type an apostrophe ( ' ) first:• you type:   '=1+1, cell shows:   =1+1