This material allows the child to work short and long multiplication problems of whole and decimal numbers. The Decimal Checker Board is made up of 49 squares colored in the hierarchical shades of green, blue and red. The diagonal squares represent the hierarchies from millions to millionths and differentiate decimals from whole numbers (colored bead bars and specially designed Number Tiles are needed to perform the exercises: Item Number: 0138M0 or 0138G0 and 0138B0). To avoid bead movement, the wood surface is covered with printed carpet.