A Divisibility Game - Identify the Spy

Author:spkwan

Topic:Arithmetic

mathemagic

my favorite 4B students
2021/11/08 & 10 — my favorite 4B students 2021/11/08 & 10

A smart observation, "9-4=5; leaving 8 behind!"

數學魔術/魔法

worksheet

References

1. 孟繁學(2005)《數學魔術：教你神機妙算未卜先知》香港：明天出版社。 2. 孟繁學(2006)《數海奇觀：向你展示魔幻謎題數海風雲》香港：明天出版社。 3. Martin, G. (1999), Mental magic: surefire tricks to amaze your friends, Sterling Pub. Co. 4. Number Pieces https://apps.mathlearningcenter.org/number-pieces/ 5. Base Ten Blocks https://www.didax.com/apps/base-ten-blocks/