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1. 把5L水桶裝滿倒進3L中，剩2L。574Please respect copyright.ＰＥＮＡＮＡrkaA9ZsdE9
8964 copyright protection570ＰＥＮＡＮＡUxdBhFbLTd 維尼

2. 3L水桶倒空，2L從5L水桶倒過來後，把5L再次裝滿。574Please respect copyright.ＰＥＮＡＮＡz4ICQPC3Hi
8964 copyright protection570ＰＥＮＡＮＡMRySItp93p 維尼

3. 再從5L水桶倒出1L到3L水桶，就OK了。574Please respect copyright.ＰＥＮＡＮＡ9lW5p7rsPj
8964 copyright protection570ＰＥＮＡＮＡJP0d8O3ZnQ 維尼

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