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翰林數學_1下_CH4_一元一次不等式解的圖示法
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翰林數學
GeoGebra
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異分母分數減法
兩位數除以一位數(一)
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
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彩色包絡球
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劉徽的「割圓術」
宇宙模型