Improve your mathematic abilities by doing calculations in your head whenever possible. For example, balance your checkbook without the aid of a calculator. Mentally figure out sales tax on a purchase. Determine the price per ounce or unit at the grocery store. Calculate how much change you should get back whenever you hand over money. Come up with the correct tip at a restaurant without using a tip guide. Find ways to use math in your daily life. Reliance on technology tends to dull our math skills, so put your calculator app away and use your brain. If you really want to challenge your brain, study advanced mathematics or chemistry.