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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
Designed by Sherzod Khaydarbekov and produced by Creative Crafthouse
not solved once and shelved
it is hand-finished to a warm reddish-amber that deepens with age
Easy to learn and full of surprises
Genaille-Lucas Rulers for Multiplication | STEM Montessori Math Aid gift for him Designed by Sherzod Khaydarbekov andGenaille Lucas Rulers A Hands On Multiplication Tool & Historical Math Aid Master Multiplication Without a Calculator Discover the Genaille Lucas Rulers, a fascinating historical math tool that simplifies multiplication with no need for mental calculations. Designed in 1891 by Henri Genaille as an improvement over Napier's Bones, this set of 11 precision engraved wooden rods allows users to instantly read multiplication results, making it an excellent
US$ 17495.00
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