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Number Line tool 數線工具
作者:
現代中學數學 Modern Secondary Mathematics
主題:
加法
,
數
,
減法
Demonstrate the addition and subtraction of directed numbers by using a number line. (Bilingual version. Supports both English and Chinese.) 利用數線展示有向數的加減。 (雙語版,支援中文和英文)
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