I have both standard and scientific calculator. I am extremely sure that scientific calculator is a great one device that standard calculator. Standard calculator can calculate division, subtraction, multiplication, addition only. But a scientific calculator have extra features.We can solve a big problem by this calculator. Being a science student, I am using CASIO fx-82MS ( S-V. P. A. M) calculator. I bought this 4 years ago and still Now it works properly. There is no problem in my scientific calculator. It has Panasonic battery and I always refer scientific calculator.