Comment Comment by jhallenworld My favorite cheap Casio is fx-115ES Plus 2nd Edition, $17https://www.amazon.com/Casio-fx-115ESPLS2-Advanced-Scientifi...Includes GCD and LCM, some of the newer ones don't have them.If you want graphing, there is the newish fx-CG100 has a nice display, but they removed Casio basic, it now only has micro Python (way too awkward to type on a tiny keypad):https://www.amazon.com/Casio-ClassWiz%C2%AE-Calculator-Funct...The older ones that still have basic:https://www.amazon.com/Casio-fx-9750GIII-Graphing-Calculator...BTW, here is a review I made of many calculators, measuring keyboard efficiency: (HP-15c still the best)https://github.com/jhallen/calculator/wiki parent jhallenworld 6 months ago
https://www.amazon.com/Casio-fx-115ESPLS2-Advanced-Scientifi...
Includes GCD and LCM, some of the newer ones don't have them.
If you want graphing, there is the newish fx-CG100 has a nice display, but they removed Casio basic, it now only has micro Python (way too awkward to type on a tiny keypad):
https://www.amazon.com/Casio-ClassWiz%C2%AE-Calculator-Funct...
The older ones that still have basic:
https://www.amazon.com/Casio-fx-9750GIII-Graphing-Calculator...
BTW, here is a review I made of many calculators, measuring keyboard efficiency: (HP-15c still the best)
https://github.com/jhallen/calculator/wiki