With these color-coded tiles, students can manipulate parts of a whole to see how those portions relate to each other. Use the tiles to perform simple math operations with decimals. Each set contains 51 plastic tiles in a sturdy plastic storage tray. Includes decimal values of 1.0, 0.50, 0.33, 0.25, 0.166, 0.125, 0.10, 0.083. Activity Guide provides suggestions for use alone or with other Rainbow Fractionr Teaching System products. Tray measures 10"L x 9"H.