108新課綱｜小三數學｜【解題】長度的加減問題（含複名數）
Synopsis
小數蛙和朋友正在研究綠豆的生長情況，比較未浸泡水的綠豆與浸泡在水中12小時和24小時的綠豆【長度：「毫米」】共5 集： ...
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