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滌塵2018-11-08 18:33:202018-11-09 17:29:00討論兩位數數值與數字的變化
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滌塵2018-10-13 18:33:252018-11-09 17:30:15位值的教學:由穿珠仔到比較兩位數的大小
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滌塵2018-09-07 12:27:362018-11-09 17:38:12位值(二) 比較數的大小, 鞏固及運用位值的觀念
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滌塵2018-09-07 11:45:012018-11-09 17:38:21位值(一)
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滌塵2018-07-27 23:05:022018-11-09 17:38:01「倒數」練習
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滌塵2018-07-27 23:03:422018-11-09 17:38:35「順數」練習
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滌塵2018-07-27 21:27:372018-11-09 17:38:58由數數到位值(串珠仔)
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