Students master addition and subtraction in a flash with a hands-on discovery can they explore on their own! Part of our Math in a Flash! series, our easy-tote can includes 25 different question cards that focus on addition and subtraction concepts, plus fun manipulative’s that get children excited about learning. Best of all, the activities are designed for independent use: Children just select a question card, then use the manipulative’s to solve each self-checking problem!