110b-數學1-【數學長知識】拆解「兆」之後的數字單位►https://topick.hket.com/article/2478864/%E3%80%90%E6%95%B8%E5%AD%B8%E9%95%B7%E7%9F%A5%E8%AD%98%E3%80%91100,000,000,000%E2%80%A6%20-%20-%E3%80%80%E6%8B%86%E8%A7%A3%E3%80%8C%E5%85%86%E3%80%8D%E4%B9%8B%E5%BE%8C%E7%9A%84%E6%95%B8%E5%AD%97%E5%96%AE%E4%BD%8D

110a-數學4-公尺的誕生►https://www.youtube.com/watch?v=0qhAwAeeXoU

110a-數學4-法定度量衡單位的由來►https://www.youtube.com/watch?v=UR2XhNLdW5s

110a-數學1-匈牙利曾印「1億兆」紙幣►https://www.youtube.com/watch?v=IwG4b-ZR_X0

110a-數學1-為什麼韓國日本的紙幣面值那麼大？►https://www.youtube.com/watch?v=pFE3UkcrgQU