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Watch Later 15:01

四下ETV小數(一)

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二下ETV除法(一)

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P.2 小學數學ETV - 基本除法

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二下除法(一)後半部

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一下基本減法

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一下ETV 減法(一)

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p.5小數乘法(二)

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6下A第8課速率(二)

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6下A第7課速率(一)

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