Educational domino "Quantities" is one of the easiest and most exciting ways to consolidate knowledge about quantities, as well as to practice the skills of adding or subtracting named numbers. Each card is divided in half, as in a normal domino. The answer is written on the left, and the operation of adding or subtracting named numbers is on the right. During his turn, the player finds a card with the answer to the expression or can attach a card with the corresponding expression to the answer.