[KongchangAI]
Unverified82% confidenceDecision RuleTime unknown

蒙氏数学教具体系(金色串珠、塞根板、纺锤棒箱)强调从具象到抽象的连续操作,需成套购买才能发挥作用,单件购买(如只买金色串珠)无法形成完整数感训练链条

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