Addition/Subtraction Double Value Flash Cards, Set of 90 by Learning Advantage
Great for teaching the relationship between add or subtract and multiply or divide, (example: 3 + 1 = 4 on one side, 4 - 1 = 3 on the reverse). Cards measure 6-1/4" x 3-1/4". Set of 90. by Learning Advantage

Grade Level: PreK, K, 1, 2, 3