But if you can’t justify a $150 calculator, there are some cheap and even free options out there to get the experience. To start with, HP has a free app that runs on Windows or Mac that works ...

Desmos offers a variety of math tools online. Many are calculators, including “a four-function, scientific, and graphing calculator.” The calculators are free to the public and can be accessed ...

Scientific calculators were invaluable ... particularly at the low, low price of free. This is one calculator that CASIO will have to keep their nose out of!