A free online calculator for basic arithmetic. This free calculator is available for desktop and mobile devices. Big keys and easy to use. This simple online calculator is great for anyone who doesn't need more advanced features.
Browser extensions for Chrome and Microsoft Edge add an icon to the browser's toolbar. The calculator remembers your last calculation so you can close it at any time and reopen without losing your work.
The following video gives some basic instruction for using a calculator. It begins with some very basic instructions for using the online calculator, and then moves on to slightly more complex operations like calculating percentages for discounts and tax. The instructions are quite generic so apply to any simple calculator.
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The following are the basic keys that you'll use most of the time. Don't forget you can use your keyboard or the on-screen keys for calculations.
The % Percent (F1) key is super useful if you want to work out discounts on items in the store, and calculating the tax on those items.
For example, you might be shopping, and want to buy something that costs $20. but, there's 12% tax that's not shown in the price. By keying in 12%20 you'll see the tax is 2.4 or $2.40. You can do the same calculation, by keying in 20x12%.
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You can easily use the calculator to work out the total cost. If you want to find your total cost, simply use the addition key. key in 20+12%, you'll get, 22.4, or $22.40.
Now, what about discounts on items? Let's say everything in the store is 20% off, and you want to buy something priced at $20. Key in 20-20%, that comes to $16. But there is still 12% tax on that, so we need to add that. Key in +12%. So now, we're paying $17.92.
Square x² - the square key takes whatever value I key in, and squares it. That is, it will multiply it by itself. If I key in 9, press the square key, and then equals, we'll get 81. That is, 9 multiplied by 9 equals 81.
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Squares are numbers getting multiplied by themselves. The square root of a number is the value, which when multiplied by itself, gives the original number. Squares and square roots are vice-versa methods. For example, the square of 2 is 4 and the square root of 4 is 2.
Fraction ⅟x - the fraction key, or 1 over x key. (also called the reciprocal key) If you key in 4, and then press the fraction key you will get a fraction with 1 over 4. 1 divided by 4, equals 0.25.
The plus minus +/- key takes the value and converts it from a positive value to a negative value, or a negative to a positive value.
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Something a little more advanced, is the use of parentheses to control the order of calculations. The two parentheses keys let you decide which part of the calculation happens first. For example, if I key 2+3x2, we'll get 8. The reason it's' 8, is because the multiplication happens before the addition. What I really wanted to do was add 2 to 3, and then multiply by 2. We can do that with parentheses. Key in (3+2)*2 now the answer is 10, instead of 8.
Sometimes we don't have whole numbers and we have to deal with decimal places. Use the Decimal point (.) key for calculating decimals.of modern calculators, the Abacus (Latin for “board“) was a grooved board with movable counting labels made up of bones or stones. It reportedly dates back to 3000 BC in ancient Babylon until when it appeared again in 5th century Greece.
Fast forward to the 21st century and we don’t only have calculators that fit in small computers but advanced ones that don’t require users to have them installed on their machine.
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Desmos is an advanced online scientific calculator. It features a tabbed user interface with buttons for making calculations in degrees and radians, angles, pie values, percentages, powers, and round numbers.
It also features a tab for entering letters and special characters e.g. brackets directly. What’s even cooler is its settings menu which has options for braille mode, projector mode, reverse contrast (dark mode), etc.
Web2.0calc provides basic and advanced mathematical functions that can be operated directly from the keyboard as well as mouse buttons. It features a math formula display, support for large numbers, an equation solver, and calculator widgets.
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Good Calculators is a project that offers a group of 300+ free, high functioning calculators for solving all sort of math and business problems. It features calculators for salary & income tax, retirement, contracts, loans, Forex, 2D and 3D shapes, GPA, logistics, sales & investments, human resource management, and several other calculation categories.
GeoGebra is a feature-rich open-source online platform built to bring together algebra, geometry, spreadsheets, statistics, graphing, and calculus into a single easy-to-use package and It has since become a leading provider of dynamic mathematics software for supporting STEM education.
It features an easy-to-use interface with an authoring tool for creating interactive learning resources in many languages for people around the world.
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Calculator-1.com is a large, easy, and convenient online calculator for use at work, school, and personal settings. It features functions for making not only basic math calculations but also interest rates on loans and mortgage payments, utility expenditure, and job bills.
Symbolab is an advanced online calculator for solving virtually any type of math problem. It has buttons and ready-made tabs for plotting graphs, tangents, matrices, multivariable calculus, sets, etc.
Using Symbolab is convenient because it has buttons that you can easily click to populate the problem field and then edit to hold problem values.
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Meta Calculator is a comprehensive sophisticated online scientific calculator and equation solver. It features all the basic functions and buttons including ones for sin, cos, tan, sech, permutations and combinations, common multiples, etc.
It can also solve linear equations that can take up to 6 equations with either 2 or 3 variables and a memory button for future calculations.
Online-Calculator is an online calculator built with the idea that “everybody needs a calculator at some point”. Coupled with its fast loading ability, it offers users different screens for different types of calculations as modules such as a BMI calculator, distance converter, ring size converter, patio calculator, scientific calculator, weight converter, stopwatch, random name picker, etc.
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Calculator.net is a website that hosts 200+ different calculators with a sole focus of providing fast, comprehensive and free online calculators that are convenient to use.
The calculators are grouped into Financial e.g. auto loan, inflation, payment, interest rate, salary, sales tax calculator; Fitness & Health e.g. calorie, BMI, pace, pregnancy conception, body fat calculators; Math e.g. triangle, standard deviation, percentage, fraction calculators; and Others e.g. GPA, concrete, subnet calculators, password generator; etc.
Bankrate is an independent, advertising-supported publisher and comparison service platform with a host of several online calculators that enable users to make finance-related calculations ranging from mortgages and loans to retirement plans and tax returns. The calculators are grouped into several categories for easy online calculations free of charge.
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I’m certain that you’ve found at least 3 awesome online calculators today. Do you have alternatives that are awesome enough to be added to the list? Feel free to add your suggestions in the comments section below.
Divine Okoi is a cybersecurity postgrad with a passion for the open-source community. With 700+ articles covering different topics in IT, you can always trust him to inform you about the coolest tech.The online graphing calculator for students expands the capabilities of math classrooms — and that’s just the start. Learn more about the full suite of TI-84 Plus CE technology and unlock the full potential of your lesson plans.
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