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Some of the more involved formulas may get very long and time consuming to type on. Excel therefore provides shortcuts in the form of functions, which are pre0defined mathematical strings which contain formulae and are named by a term which best describes their use:
Common functions
=SUM (??:??): Totals the contents of a range of cells (see below)
=AVERAGE(??:??): Calculates the average of the contents of a range of cells
=SQRT(??): Calculates the Square rRot of the contents a cell
To find out more common fnctions click here
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