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GeoGebra
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盈利與虧蝕
百分數及其應用
平行線的判定
第八周作业1
撒针估算面积实验
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龍騰4_1-1課進9
Finding the H.C.F. and the L.C.M.
ma_test
比較角的大小二
同心六邊形
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Algebra
Matrices
Trigonometry
Trapezoid
Symmetry