Magic Crosses
幻十字
December 2018 Webinar
Teaching Materials & References
1. NRICH
https://nrich.maths.org/magiccrosses/
2. Numeracy CD
https://www.numeracycd.com/contents/activities/addition/magiccross/crosses.htm
3. 劉燕燕&石楓(1984)。《數學遊戲》, 頁2。內蒙古：人民出版社。(燕華老師提供)
Keywords: Magic Crosses, 十字型填數遊戲