Excel Addition Formula:
=SUM( number1, [number2], ... )
where number1, [number2], etc. are one or more numbers (or references to cells containing numbers) that you want to add together.
Excel Subtraction Formula
The simplest type of Excel subtraction formula consists of the = sign, followed by two or more numbers, with the - operator in between them. This is shown in the spreadsheet on the right.
Multiplication in Excel
=PRODUCT( number1, [number2], ... )
where number1, [number2], etc. are one or more numeric values (or references to cells containing numeric values) that you want to multiply together.
