These cards provide practice for solving unknown quantities in one of three locations. Focuses on equivalent equation practice, unknown variable problem solving, and inverse operations and commutative property and skill building. Contains 162 easy-t..

By Christine A. Koers, BS, MS.
Practice basic mathematical functions using both positive and negative numbers. Set includes 48 integer flash cards and five challenge flash cards. One math problem per side. The answer can be found on the back..

Great for teaching the relationship between addition and subtraction. Set of 90 classroom-sized cards (6-1/4" x 3-1/4" each). Grade K and up.