- "Chessboard" - colored mat for multiplication of multi-digit numbers by multi-digit using colored pearls. The mat is sewn from cotton canvas and it has sewn ribbons to bind it after rolling into a roll.
- The mat is used for multiplication of multi-digit numbers by multi-digit using colored pearls.
- It is sewn from cotton canvas.
- Three colours: green, blue and red form squares with a side of 7,5 cm.
- The mat has sewn ribbons to tie it after rolling into a roll.
- Unlike hard surface checkerboards, the beads won’t roll around, a definite advantage.
- The color tone may be slightly different from that seen on the monitor.
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