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

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

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

圆面积圆周率计算公式推导演示模型教具小学数学科教仪器

20 piece

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Specifications		Stock	Quantity
size(尺寸)	USD $0.0	999 piece available
4524 10cm(452410CM)	USD $0.0	999 piece available

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Packaging information

CTN Size: 46 × 48 × 32 cm

G.W./CTN:16 kg

QTY/CTN:12 piece/carton

备注：下单发货时请联系确认（因现货实时变化）

这款圆面积圆周率推导演示教具，直观展示公式推导过程，解决小学生理解困难痛点。

核心卖点包括动手操作、趣味学习，产品优势为提升数学兴趣和成绩。

通过国家教育认证，品牌信誉可靠，激发孩子探索热情，让学习不再枯燥。

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Update time：20251019152009