Unverified82% confidenceFactTime unknown
国际通用的库森奈尔数棒(Cuisenaire Rods)用10种颜色对应长度1-10的木棒,白1cm、红2cm依次递增,通过长度比较直观呈现加减和倍数关系,广泛用于欧美数学启蒙
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82%
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Long-term
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