[KongchangAI]
Unverified85% confidenceDecision RuleTime unknown

6-12岁数学教学建议选带精确刻度的横梁天平(游码可读到0.1g或0.2g),配套10g/20g/50g/100g等分级砝码,才能演示'凑十''等式平衡'等抽象概念

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