## Classroom Calculators

The calculators below will allow you to analyze a variety of data. Some calculators require java and javascripting, if you do not have this enabled in your web browser, they will not work for you.

Currently, the following calculators are available:

**Date Difference****GPA****Graph Drawing****Lunar Calendar****MathTimeFunction****Metric Conversion****Number to Words Convertor****Plane Graphic****Prime Number Generator****Simple****Simple Calendar****Simple Timer****Venturi Tube****World Clock**

## What Are the Buttons on a Calculator Other Than Numbers?

Calculators have become an essential tool that everyone possesses due to their functionality in computing complex arithmetic expressions. But numbers aren’t the only keys we see on a calculator. What are the other calculator function keys for?

**Calculator Function Keys**

You might find some odd-looking keys with unfamiliar signs or abbreviations on a basic calculator. While these keys might seem useless, the proper knowledge can make these come in handy at some point. Some of the keys that perform basic calculator functions are as below:

**Operational Keys**

These keys perform the four operations on any inserted value. These include:

**+ Sign**

A plus sign is used to perform addition on two or more values.

**– Sign**

A minus sign is used to perform subtraction on two or more values.

*** or × Sign**

A cross or an asterisk sign is used to perform multiplication on two or more values.

**/ or ÷ Sign**

A divide or slash sign is used to perform division on two or more values.

**Memory Keys**

Whenever you start using a calculator, its initial memory is 0. Memory keys are what add or subtract the values you’ve input into the calculator’s memory.

**m+ Key**

The memory plus Sign is responsible for adding the displayed value to the calculator’s memory.

**m- Key**

The memory minus Sign is responsible for subtracting the value on display from the calculator’s memory.

**mr Key**

The memory recall sign commands the calculator to recall the value from its memory.

**mc Key**

The memory clear sign commands the calculator to clear away its memory bringing it to zero again.

**Clear Keys**

These keys help wipe out a number or operation if you have made an error.

**AC Sign**

The all-clear Sign erases the recent calculation of the calculator.

**CE Key**

The clear entry sign erases the recent entry on the calculator.

**Other Function Keys**

**% Sign**

A percentage sign performs a percentage function upon a value.

**√ Sign**

A radical sign performs the square root function upon a value.

**Switch Keys**

These keys turn a calculator on or off.

**ON Sign**

An on Sign turns on a calculator for use. Often, a CE command is also adjusted on the same button.

**OFF Sign**

An OFF sign turns off a calculator once you’re done using it. It also erases the memory of your previous calculations.

**Other Keys**

**. Sign**

A dot sign is indicative of a decimal. Whenever you want to type a decimal value, press the dot sign to get you a decimal point.

**= Sign**

An equal sign is an integral key in a calculator. This command allows the calculator to come up with the answer to the computation you demanded and display it on your screen.

**Conclusion**

Once you’re familiar with all the calculator function keys and the purpose of each, it makes computation easy. Knowing the basic calculator functions is imperative to make the most of a simple calculator when a scientific one isn’t available. Though it can’t give you graphs on such a small screen, a basic calculator can perform operations on enormous values for an efficient and accurate calculation.