Using Calculators Worksheets

How to Use a Calculator - When we calculate two plus two, we imagine a number line, start at two and hop over a couple of spots to get to four (or at least we did until we memorized the answer). Simple - so simple, in fact, that "putting two and two together" is an analogy for deducing something obvious. But what if you cannot imagine a number line? What if you are a little, gray, button-covered box full of electrons? How, then, do you calculate that two plus two equals four? The process itself is not so simple, but once you understand how this basic arithmetic operation works in a calculator, you can "put two and two together" as to how it performs much more complicated calculations. First off, the input: when you press the "2" key, the button compresses a rubber pad below it, which in turn pushes an electrical wire into contact with another one, creating a circuit between them. Powered by a battery, electricity flows along the circuit to transistors.