MEGA Brands, Inc DDV04 Subtraction Flash Cards, Leap Frog, Grades K-1, 80/Pk by The Board Dudes

Subtraction flash cards reinforce the key math skills children need to succeed in kindergarten and first-grade. Double-sided cards help your child learn counting, subtraction and number identification. Unique design helps kids build fluency through repeated practice and memorization and makes learning fun for parent and child.