Standard 6 · 数学 (Mathematics)

平均数

算術平均數的難點往往在於如何從總和回推各個數據的值，特別是當題目包含未知的遺漏數值時最容易出錯。只要你熟練掌握總和與個數之間的運算關係，就能輕鬆破解小學數學考試中各類關於平均數的應用題。

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