ICalc Bluetooth Calculator Keypad VP6274 User Guide. USB-C Dual 4K Multi-Stream Mini Docking Station; USB-C Multi-Port Hub & Docking Station. To use free online calculator you can use both ordinary numeric buttons at the top of a keyboard and numeric buttons on the right of a keyboard. To enter = - key Enter. To erase the last character - Backspace (arrow keys). To enter + - key + at the top or + key on the numeric keypad on the right.
Calculator Operations
This basic online calculator is similar to a small handheld calculator and has the standard four functions for addition, subtraction, division and multiplication. Like most 4-function calculators it also includes keys for percent, square, square root and pi. This basic calculator has decimal precision up to 10 digits and offers these functions:
- mc = Memory Clear: clear calculator memory
- m+ = Memory Plus: add displayed value to memory
- m- = Memory Minus: subtract displayed value from memory
- mr = Memory Recall: display the memory value
- CE = Clear Entry: clear current display value, changes to AC
- AC = All Clear: clear all and start a new operation
- √x = Square Root: take the square root of the displayed value and display it
- +/- = Plus/Minus: change the sign of the displayed value from positive to negative or vice versa
- π = pi: display the value of π as 3.141592654 to use in a calculation
- x² = Square: square the displayed value and display it
- R2 = Round to 2 decimals: round the current display value to 2 decimal places such as in money or currency format
- R0 = Round to 0 decimals: round off the current display value to 0 decimal places
- % = Percent: use displayed value to calculate a percentage
Accessible Calculator Features
Zoom: Increase the size of the calculator in your browser using your browser's zoom feature. The size of the calculator, text and buttons changes proportionately.
Touch Screen Zoom: Increase the size of the calculator on your touch screen by zooming with your fingers. The size of the calculator, text and buttons changes proportionately.
Text Size: In some browsers, such as Chrome desktop, you can change the text size in your browser settings and the size of the calculator, text and buttons will get larger or smaller proportionately.
Keyboard Control: You can use the calculator without a mouse by tabbing among the calculator keys. Press 'Enter' when a key is focused. This method can be arduous however, since you must tab through all keys in sequence.
Number Keypad Control: You can use the calculator with with most Number Pads and Keyboards in the most popular browsers for numbers, clear, and the basic functions of addition, subtraction, multiplication, and division and delete/backspace.
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Calculating Percentages
Calculator Keypad
- Multiplication and Division will convert the displayed value to a percent in decimal form and complete the operation when you press [=]
- Example: find 20% of 25
- Enter 25 x 20 % and the display changes 20% to 0.2
- Enter = to complete the calculation 25 x 0.2 = 5. The answer 5 shows in the display.
- Addition and Subtraction will add or subtract the percentage of a value
- Example: add 20% to 25
- Enter 25 + 20 % and the display changes to 5. (5 is 20% of 25)
- Enter = to complete the calculation 25 + 5 = 30. The answer 30 shows in the display.
- Tax Calculation
- Example: add 6% tax to a purchase of $851
- Enter 851 + 6 % and the display changes to 51.06. (51.06 is 6% of 851)
- Enter = to complete the calculation 851 + 51.06 = 902.06. The answer 902.06 shows in the display.
- Note: for other problems you might get an answer with more than 2 decimal places. Use the R2 key to round off to dollars and cents. Use R0 to round off to only dollars.
Large, easy and convenient online calculator
Use for work, school or personal calculations. You can make not only simple math calculations and calculation of interest on the loan and bank lending rates, the calculation of the cost of works and utilities.
Commands for the online calculator you can enter not only the mouse, but with a digital computer keyboard. Detailed instructions for using the calculator, see below.
Instructions for using the online calculator
Keys function
[ 0 ], [ 1 ], [ 2 ], ... [ 9 ] - standard number keys;
[ 00 ] - key input 2 zeros;
[ → ] - remove the last character on the display;
[ +/- ] - change the mathematical sign of;
[ XY ] - calculation of X to the power of Y;
[ √ ] - calculate the square root;
[ + ] - addition, [ - ] - subtraction, [ х ] - multiplication, [ ÷ ] - division;
[ % ] - calculates percentages;
[ M+ ] - stored in the memory with the sign [ + ];
[ M- ] - stored in the memory with the sign [ - ];
[ MR ] - get the contents of memory;
[ MC ] - erases the memory content;
[ AC ] - reset the calculator and reset the memory;
[ C ] - resets the calculator without resetting the memory.
Examples of calculations on the online calculator
Calculate the square root of 529: 529 [ √ ]. The result is equal to 23.
Raise the number 3 to a power 4: 3 [ XY ] 4 [ = ]. The result is equal to 81.
Calculation of percentage of the number of: 500 [ х ] 25 [ % ]. The result is equal to 125.
Calculating what percent is one number of another number: 25 [ ÷ ] 500 [ % ]. The result is equal to 5(%).
Adding percentage to the number: 500 [ + ] 25 [ % ]. The result is equal to 625.
Deduction percentage of the number: 500 [ - ] 25 [ % ]. The result is equal to 375.
Enter commands from the keyboard PC/Mac
To use free online calculator you can use both ordinary numeric buttons at the top of a keyboard and numeric buttons on the right of a keyboard.
To enter [ = ] - key [Enter].
To erase the last character - [Backspace] (arrow keys).
To enter [ + ] - key [ + ] at the top or [ + ] key on the numeric keypad on the right.
To enter [ - ] - key [ - ] at the top or [ - ] key on the right.
To enter [ x ] (multiplication) - key [ * ] on the numeric keypad on the right or a combination of keys[ * ] and [ Shift ].
To enter [ ÷ ] (divide) - key [ / ] on the numeric keypad on the right or a combination of keys [ : ] and [ Shift ].
Usb Keypad Calculator
Frequently asked questions about the calculator
Why do we get 8 when trying to calculate 2+2x2 with a calculator?
Calculator performs mathematical operations in accordance with the order they are entered. You can see the current math calculations in a smaller display that is below the main display of the calculator.
Calculations order for this given example is the following: 2+2=4, subtotal - 4. Then 4x2=8, the answer is 8.
The History of calculators
The ancestor of the modern calculator is Abacus, which means 'board' in Latin. Abacus was a grooved board with movable counting labels (stones or bones).
Presumably, the first Abacus appeared in ancient Babylon about 3 thousand years BC. In Ancient Greece, abacus appeared in the 5th century BC.