香港閱讀城 - Smart Mathematicians Lower Primary-21 Max And The Grandfather Clock
Smart Mathematicians Lower Primary-21 Max And The Grandfather Clock
出版日期：
01/2018
叢書：
Smart Mathematicians
The grandfather clock chimes the same number of times as the hour shown on the clock face. When it is 6 o’clock, the grandfather clock will chime 6 times and it takes 30 seconds to do that. How many seconds does it take to chime when it is 12 o’clock?
版面：
固定
關鍵字詞：
數學
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