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tool2
Author:
蘇梓棱
GeoGebra
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异形操场
撒针估算面积实验
折扣
GeoGebra数学资源(4-8年级)
百分數及其應用
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量度的誤差 Errors in Measurement
hint
堆一堆222
ggb 優良作品_10
任意三角形
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Statistical Characteristics
Frequency Distribution
Sequences and Series
Curve Sketching
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