Question: what is the difference between casio fx991es and fx991es plus?
Answer: Casio fx-991ES Plus has 417 features, Casio fx-991ES has 403. Casio fx-991ES Plus is faster than Casio fx-991ES. Casio fx-991ES Plus can generate table for functions f(x) and g(x) but Casio fx-991ES can only f(x).