It's all about mathematics and calculators
Taking some time from my math blog to speak about today. This is a day we in the United States will never forget. Blessings to the families who suffered the losses on that horrible day in 2001. May this world find peace soon.
Pictured: Pic 1: Casio fx-991CN X (China) Pic 2: Casio fx-570SPX II Iberia (Spain) Pic 3: Casio fx-92 Collège (France) All original co...
