How do people do it? How can you multiply by 25 or multiply by 3367 in your head? Here is the answer!!!!

Below you will find a list of PDF files that can help you with all of your mental math needs. Refer to this site regularly for updates and additional files!!! If you want to search the files through html, click on the corresponding link!

Note: If the files are taking too long to view or you would like to download them for future reference, right-click on a link and choose the "Save Target As..." option.