直式三位數加法
工作紙
參考資料 1
參考資料 2
https://nzmaths.co.nz/resource/nine-tiles
延伸學習 1
https://www.transum.org/software/SW/Starter_of_the_day/starter_April4.asp
延伸學習 2
https://www.geogebra.org/m/mYTjP7Fc
延伸學習 3
https://www.geogebra.org/m/pqude5ba
Number Pyramids: nrich.maths.org
https://nrich.maths.org/numberpyramids
Magic Squares: 洛書
https://www.storyofmathematics.com/chinese.html
隨機數字
GeoGebraScript: RandomBetween[a, b][br]Microsoft Excel: RANDBETWEEN(a, b)