Addition And Subtraction Three-corner Flash Cards

Learners of any age find Three Corner Flash Cards engaging and fun! Unique three-sided cards teach not just addition and subtraction facts from 0 to 12, but also the relationship between them. 240 equations are included in the set. Self-checking cards are durable, easy to hold, and have big, easy-to-read type that can be seen from across a room. Great for use at home and on-the-go, in classrooms, small groups, and individual practice. Award-winning set supports national and state early-childhood math standards. Handy reusable storage container holds 46 cards, 5-1/2" across.Recommended for ages 6 and up.