How often should you use your calculator? I try to use mine as least as possible, even if it means doing trivial division or multiplication on paper or in my head. I seriously forget to use the calculator and sit there trying to figure stupid stuff out. This gets me into trouble when I make careless mistakes in my arithmetic, as opposed to the mathematics itself. I am afraid if I use my calculator, I will lose any intuitive feel for numbers, or never learn some method or concept because I didn't work it out on paper everytime. I only use my calculator, when I absolutely have to (sin,cos,tan and some other things). I think it's because I never used it through high school, so now I have no idea what it is even good for. I have a TI-83+, should I be using this more for Calculus? Is there is a proper way to use the calculator? I know these questions are silly, but again, I am self-taught so I have no outside advice to compare myself. I definitely make mistakes without one, so I am trying to figure out what the perfect balance is.