=SUM()

Adds a series of cells together.

=AVERAGE()

Calculates the average of a series of cells.

=IF()

checks if a condition is met and returns a value if YES and a value if NO

=MIN()

Provides the minimum value in a series.

=MAX() 

Provides the maximum value in a series.

=LARGE() 

Returns the k-th largest value in a series.

=SMALL()

returns the k-th smallest value in a series

=COUNT()

counts the number of cells in a range that contain numbers

=VLOOKUP()

looks for a value in the leftmost column of a table and returns in the same row from a column you specify