Back 【解題】觀察百數表上 5 個一數的數的個位數字 登入觀看 ⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles. 【解題】觀察百數表上 5 個一數的數的個位數字 上傳學習單 下載學習單