It's all about mathematics and calculators
Sorry I have not blogged in while. For the students: are you in school or about to go back? What math classes are you taking?
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...
