Standard 3 · 数学 (Mathematics)

周长

計算多邊形的周長時，許多同學常因為漏算內縮邊長或忽略圖形缺口而導致答案錯誤。熟練掌握如何將不規則圖形的邊長進行平移與加總，是應對小學數學考試中各類應用題的關鍵技巧。

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