蒙氏等值分数塔小数百分数教具stem小学数学加减运算 透明分数拼插条
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蒙氏等值分数塔小数百分数教具stem小学数学加减运算 透明分数拼插条
| 颜色(Color) | Multicolor |
| 尺寸(Size) | 12.2cm |
| 材质(Material) | PP |
| 年龄层(Age Level) | 3-4 Years |