How Do Calculators Work?
    By: Katelyn S.


                          Why Calculators?

First, you need to know why we use calculators. So the reason we use calculators is, because our brains can not store every number problem in their head so we use the calculator to help us, like an aid. On a website I read, it said that in the 1950s a famous psychologist, George Miller, said humans can remember 5-9 digits. That is before we forget or our brain starts to ache or hurt.

                    What Is A Calculator  

Now, we can move on to what a calculator is. Well, a calculator is an aid for people to use in math. Calculators do math for us a lot quicker than we can. Since we can only store 5-9 digits in our head we relay on a calculator to help us to figure out equations we can't do in our head.

                   Parts Of A Calculator

There are many parts of calculators so we'll start with the simple parts. There is the front of calculator keys. Then there is the back of the calculator keys, and the screws that come out of the back to take it apart. There is also the keyboard membrane. The keyboard membrane may sound complicated but it is just the buttons and the pieces that touch the keyboard sensors for the numbers to show up on the display. Next it gets a little harder, there is the Lithium Battery, the display panel, and processor clip. The battery keeps the calculator running and the display panel shows you the number keys you have pressed on the calculator.

Parts of a 19th Century Calculator

Parts Of The Modern Day Calculator

Mechanical Calculators

These calculators were made in the late 19th century. They were the 1st affordable pocket calculators that went up for sell. Also they had levers and gears unlike the kind we have today. One of the reasons these were created is because of the development silicon microchips. These were invented between 1947-1958. Many other electronic calculators were made because of this.

19th Century Mechanical Calculator

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