Kids react with excitement to these unique flash cards that teach 2 math operations and the relationship between them. Self-checking cards include multiplication and division facts through 12. • Includes 48 double-sided triangular cards in a sturdy storage box. • Teaches two different math operations and the relationship between them. • Facts through 12. • Self-checking cards teach multiplication and division and the relationship between them. • Facts 1-12. • 5-1/2 triangles. • Sold as 48/Set.