This is a set of 20 task cards that are designed to help children calculate a tip. I teach the kids to find discounts mentally (find 10%, double it for 20%, halve it for 5%, etc). All of these cards use either 20% or 15% for the tip amount. My students had already learned how to find a discount mentally, but needed more practice with finding 15%. I also wanted them to see that the percent isn't always subtracted from the total, as it is with a discount. The cards could also be used with the p