If the person writing the formula doesn't know or understand the order of operations, then their formulas will give the wrong results. They may not even realise this. Computers follow the laws of mathematics, so it is important to understand them. See the related question below.
Yes it can.
It can change a total that the formula results in.
Formula wooksheet
Order of Operation.
Yes, an Excel formula can include more than one operation. You can use a combination of arithmetic, comparison, and text functions within a single formula to perform multiple operations on data. Just make sure to use appropriate syntax and order of operations to get the desired result.
If you are talking about math, a formula is a representation of some type of operation, usually between numbers. An example of a formula in Excel is: =12*(34+14). Use use them to find a result of some type of calculation.
In Excel there can be many hierarchies. Cells are in a worksheet, a worksheet is in a workbook. A grand total formula could be adding up the results formulas giving other totals. There can be hierarchy in graphics.
In Excel an equation can be a formula. All formulas in Excel must start with the equals sign. That is what tells Excel it is a formula.
The results of formulas that you type in are outputs in Excel. If you do filters, the results you get are outputs. Charts are an output. If you print anything from Excel, that is an output.
There is no formula error button in Excel. However, there is an Error Checking button on the Formulas ribbon in the Formula Auditing section in Excel 2007.
The PVIFA formula in excel refers to Present Value Interest Factor of Annuity. This is able to be calculated in an excel document.
It is known as Automatic Recalculation.