round area ratio calculation formula derivation demonstration teaching aids model primary school mathematics science and education instrument_青华科教仪器有限公司

round area ratio calculation formula derivation demonstration teaching aids model primary school mathematics science and education instrument

round area ratio calculation formula derivation demonstration teaching aids model primary school mathematics science and education instrument

圆面积圆周率计算公式推导演示教具模型小学数学科教仪器

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CTN Size: 46 × 48 × 32 cm

G.W./CTN:11 kg

QTY/CTN:12 piece/carton

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【小学数学必备】圆面积圆周率计算公式推导演示教具模型，直观展示πr²推导过程，让孩子轻松掌握数学原理！采用环保材质，安全，经久耐用。专为6-12岁儿童设计，解决抽象公式理解难题，提升学习兴趣。通过国家教育认证，家长放心选择。让数学学习变得简单有趣，激发孩子无限潜能！

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