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Visual discrimination of dimensions
Set of 9 basic wooden grammar symbols in a wooden box
-Three sets of equilateral triangles in red
a pink tray is included
each in 3 colors and each in 3 sizes
Checker Board rack Visual discrimination of dimensionsThe Checker Board is used for short and long multiplication with the hierarchies in the decimal system up to 100,000,000. To avoid bead movement, the wood surface is covered with printed carpet.
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