A calculator is an incredibly useful tool that can be used in many different ways. Here are some of the most common ways people use their calculators.

**The Use of a Calculator in Everyday Life**

A calculator is often used in everyday life to help with simple math problems. It can be used to add, subtract, multiply, and divide numbers. A calculator can also be used to figure out percentages and ratios.

**The Use of a Calculator in Business**

A calculator can also be used in business to help with more complex math problems. Using a calculator, you can solve for x in equations, figure out the amount of money you need to put into an account so that it earns a certain percentage interest, and determine price per unit.

A calculator can also be useful for determining distance rates and sales tax.

**The Three Basic Mathematical Operations for a Calculator**

To use a calculator, you need to understand the three basic mathematical operations: addition, subtraction, and multiplication.

When you are adding two numbers together, you place the first number in the calculator’s “add” or “enter” row and the second number in the calculator’s “subtract” or “minus” row. Then you hit the “=” button.

The process is much the same for subtraction except that you place the first number in the calculator’s “subtract” or “minus” row and the second number in the calculator’s “add” or “enter” row. Then you hit the = button.

The process to multiply two numbers is a little different. You enter one number in the “multiply” row and the second number is placed in the “divide” row. Then you hit either of the two buttons, which will give you your answer or result.

The process to figure out percentages is also slightly different than that for addition and subtraction. In order to figure out percentages, you first need to change the percent into a decimal by moving the decimal point two places to the left. Then you use your calculator as if it were a regular addition or subtraction problem.

**What is 15 of 350?**

To solve this, you would enter 350 in the calculator’s “add” row and 15 in the calculator’s “multiply” row. Then hit the = button to get your answer.

You can also use a calculator to find square roots and cube roots.

**Using Your Calculator When Shopping at the Grocery Store for Foods for One Week**

A useful application of a calculator is to determine the total cost of all the food you need to buy in order to eat for one week.

You can use your calculator to figure out how much each item on your grocery list costs by using the price per pound or unit and any fractions you find while shopping. Simply enter this number into your calculator.

Then enter the number of pounds you are buying in your calculator’s multiply row and the price per pound or unit in your calculator’s divide row. Then hit the = button to see how much your item costs.

**Conclusion**

The calculator is a great math tool that can be used in many different ways. Once you figure out how to use your calculator, it will help you with addition, subtraction, multiplication, and division as well as determining percentages, ratios, square roots and cube roots.

It can even help you with basic business problems such as determining distance rates and sales tax, solving for x in equations, figuring out the amount of money you need to put into an account so that it earns a certain percentage interest, and determining price per unit.

Just remember that you can use your calculator for more than simple arithmetic. Your calculator can be used to solve any standard function of math problems.