Addition/Subtraction of Numbers
1. Addition(of two 2-digit numbers) Challenge
WORKSHEET - Addition of Numbers
snapshots 2022/06/08(Wed) 1E, 1D & 1A
for discussion:[br]1) math analysis[br]2) variations e.g. max, min, sum=50, ...
2. Addition/Subtraction Challenge
snapshot 2022/06/22(Wed) 1E
https://nrich.maths.org/virtualdice/responsive.html
virtual dice
3. Digits 1-9 Challenge
snapshot 2010/12/10 2D
https://www.geogebra.org/m/kfwrphgr
4. Reference: Darrell Morgan 〈The Digits 1 to 9〉
GeoGebra apps:[br]https://www.geogebra.org/m/u2uvrzzg[br]https://www.geogebra.org/m/t4hum8mj[br]https://www.geogebra.org/m/cr5mbcmd
More References
1. NRICH 〈Playing with Dice〉[br][url=https://nrich.maths.org/8311]https://nrich.maths.org/8311[/url][br]2. Lynda R. Wiest 〈Fostering number sense through digits & dice 〉[br][url=https://www.researchgate.net/publication/234661837_Fostering_Number_Sense_through_Digits_and_Dice]https://www.researchgate.net/publication/234661837_Fostering_Number_Sense_through_Digits_and_Dice[/url][br]3. Nancy Segal Janes 〈Exploring Math with Polyhedra Dice〉