6 上 — 影片：解平均數應用題（增加數據）
Synopsis
牛津小學數學自學教室.
![[數學教室] 小六 平均數](https://i.ytimg.com/vi/8t2SnN5LYVA/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDFQrHrVpdGysiiTa9b3p642Meakg)
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