This document provides an overview of common Excel formulas taught by Mrs. Asih including AVERAGE, MAX, MIN, COUNT, and COUNTA. It explains that Excel formulas begin with an equal sign (=) and can include functions, references to cells, constants, and basic operators. Examples are provided for each formula type. The AVERAGE formula returns the average arithmetic value of a range, MAX finds the highest value in a range, MIN finds the lowest value, COUNT calculates the number of numeric values in a range, and COUNTA counts all non-empty cells.