Open the calculator on your iPhone. Press "mc" and "c" to zero out the calculator's memory and display. Calculate the fractional portion of the first mixed fraction 3 5/8, which is 5/8.

Sometimes, I just like the tactile feel of calculator buttons under my fingers. Using a smartphone just doesn’t seem as ...

In 1911 the Burroughs Adding Machine Company introduced a key-driven adding machine much like the Comptometer made by Felt & Tarrant Manufacturing Company. The Burroughs calculator, as the new machine ...