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See What You Can Do with a Calculator on Screen

Calculator apps can do a lot more than just add, subtract, multiply, and divide. Here are some of the things you can do with a calculator on your phone or tablet:

Solve complex equations. Calculators can solve equations with multiple variables, trigonometric functions, and exponents.
Convert units of measurement. Calculators can convert between units of measurement, such as inches to centimeters, pounds to kilograms, and miles to kilometers.
Calculate percentages. Calculators can calculate percentages, such as finding the discount on an item or the tip for a restaurant bill.
Perform statistical calculations. Calculators can perform statistical calculations, such as finding the mean, median, and standard deviation of a set of data.
Graph functions. Calculators can graph functions, such as linear functions, quadratic functions, and exponential functions.
Solve word problems. Calculators can help you solve word problems, such as finding the area of a triangle or the volume of a sphere.

Here are some of the benefits of using a calculator:

Accuracy. Calculators can help you avoid mistakes when performing calculations.
Speed. Calculators can perform calculations much faster than you can by hand.
Convenience. Calculators are always available when you need them, and they can be used anywhere.

Here are some of the drawbacks of using a calculator:

Dependence. If you rely too heavily on calculators, you may lose your ability to perform calculations mentally.
Cost. Calculators can be expensive, especially if you need a high-quality model.

Overall, calculators are a valuable tool that can help you perform calculations quickly and accurately. However, it is important to use calculators wisely and to avoid becoming overly dependent on them.

calculator on screen

See What You Can Do with a Calculator on Screen

How to Find the Best Calculator for Your Needs

There are many different types of calculators available, so it is important to find one that meets your specific needs. Here are some things to consider when choosing a calculator:

Type of calculations that you need to perform. If you only need to perform basic calculations, such as adding and subtracting, then you can get by with a simple calculator. However, if you need to perform more complex calculations, such as solving equations or graphing functions, then you will need a more advanced calculator.
Features that you need. Some calculators have additional features, such as the ability to convert units of measurement, calculate percentages, or perform statistical calculations. If you need any of these features, then be sure to choose a calculator that has them.
Price. Calculators range in price from a few dollars to several hundred dollars. The price of a calculator will typically reflect its features and capabilities.

Once you have considered these factors, you can start shopping for a calculator. There are many different places where you can buy calculators, including:

Office supply stores. Office supply stores typically have a wide selection of calculators to choose from.
Electronics stores. Electronics stores typically have a good selection of calculators, including high-end models.
Online retailers. Online retailers, such as Amazon.com, offer a wide selection of calculators at competitive prices.

4 Useful Tables

Operation	Shortcut	Example
Addition	+	2 + 3 = 5
Subtraction	-	5 - 2 = 3
Multiplication	*	3 * 4 = 12
Division	/	12 / 3 = 4

Function	Shortcut	Example
Sine	sin	sin(30°) = 0.5
Cosine	cos	cos(60°) = 0.5
Tangent	tan	tan(45°) = 1
Inverse Sine	asin	asin(0.5) = 30°
Inverse Cosine	acos	acos(0.5) = 60°
Inverse Tangent	atan	atan(1) = 45°

Statistical Measure	Shortcut	Example
Mean	mean	mean(2, 4, 6, 8, 10) = 6
Median	median	median(2, 4, 6, 8, 10) = 6
Standard Deviation	stdev	stdev(2, 4, 6, 8, 10) = 2.83
Variance	var	var(2, 4, 6, 8, 10) = 8