This is a Microsoft Excel File that has basic math formulas that figure out simple math problems. It is designed for both the inquisitive student who enjoys finding patterns and the student who could benefit from a computer doing the basic math. There are tabs for adding/subtracting, multiplying/dividing, finding the Greatest Common Factor/Least Common Multiple, Factorials, and Roman Numerals. I got the GCM/LCM, Factorials, and Roman Numerals functions off of the Mr. Excel Podcast. What a great podcaster!