Standard Calculator Online

What Are the Functions on this Standard Calculator

1. Basic Operations:

   • Addition (+)
   • Subtraction (−)
   • Multiplication (×)
   • Division (÷)

2. Display Management:

   • clearAll(): Clears the entire display and resets memory.
   • clearEntry(): Clears the current entry from the display.
   • toggleSign(): Toggles the sign of the displayed number between positive and negative.

3. Memory Functions:

   • memoryClear(): Clears the stored memory.
   • memoryRecall(): Recalls the stored memory value and displays it.
   • memoryAdd(): Adds the current displayed value to the memory.
   • memorySubtract(): Subtracts the current displayed value from the memory.

4. Calculation:

   • calculate(): Evaluates the expression displayed using eval(), handling errors by displaying “Error” if the calculation fails.

5. Square Root Function:

   • The button for square root (√x) is set up to append the function to the display, but it requires specific handling in the calculation logic.

Overall, this calculator allows users to perform basic arithmetic operations, manage memory functions, and toggle the sign of numbers.

How to Use Standard Calculator Operations

Basic Operations

Addition (+)

1. Start by entering your first number:

   • Click the number button you want to input, such as 1, 2, or 3.
   • For example, to add $5+3$, click 5.

2. Select the addition operator:

   • After entering the first number, click the + button to indicate that you want to add another number.

3. Enter the second number:

   • Click the button for the second number. In this example, click 3.

4. Get the result:

   • Click the = button to perform the calculation. The display will show the result, which in this case is 8.

Subtraction (−)

1. Enter your first number:

   • Click the button for the number you want to subtract from. For example, click 10.

2. Choose the subtraction operator:

   • Click the − button to indicate that you are about to subtract another number.

3. Input the second number:

   • Click the button for the number you want to subtract. For instance, click 4.

4. Calculate the result:

   • Click = to see the result. The display will show 6.

Multiplication (×)

1. Input your first number:

   • Click a number button, such as 7.

2. Select the multiplication operator:

   • Click the × button to indicate multiplication.

3. Enter the second number:

   • Click another number button, such as 8.

4. View the result:

   • Click = to calculate. The display will show 56.

Division (÷)

1. Start with your first number:

   • Click the button for the number you want to divide, such as 20.

2. Choose the division operator:

   • Click the ÷ button to specify division.

3. Input the second number:

   • Click the button for the divisor, for example, 4.

4. Calculate the result:

   • Click = to see the result. The display will show 5.

Additional Functions

Clear All (AC)

• If you want to start over completely, simply click the AC button. This will clear everything on the display and reset any stored memory values. It’s useful if you make a mistake or want to perform a new calculation without any previous data.

Clear Entry (CE)

• If you’ve entered a number but decide you want to clear just that entry (for example, if you typed 15 but want to change it to 12), click CE. This clears the current input without affecting the rest of the display or memory.

Toggle Sign (+/−)

• To change the sign of the number displayed (for instance, from 5 to −5), simply click the +/- button. This is particularly useful if you need to switch between positive and negative numbers during your calculations.

Memory Functions

Memory Clear (MC)

• If you’ve stored a value in memory and want to clear it, simply click the MC button. This resets the memory to zero, which is helpful when you want to ensure no residual values affect your calculations.

Memory Recall (MR)

• To display the value currently stored in memory, click the MR button. This will bring the stored value onto the display, allowing you to use it in calculations or simply check what’s stored.

Memory Add (M+)

• After performing a calculation, if you want to add the displayed value to memory, click M+. For example, if the display shows 10, clicking M+ will add 10 to your memory. This is useful for keeping track of cumulative totals.

Memory Subtract (M−)

• To subtract the displayed value from memory, click M−. For example, if you have 10 in memory and the display shows 3, clicking M− will update the memory to 7. This function is helpful when you want to deduct values from your total.

Special Functions

Square Root (√x)

1. Using the square root function:

   • To calculate the square root of a number, click the √x button. This appends the function to the display.
   • For example, if you want to find the square root of 16, you would first input Math.sqrt(16) manually in the display.

2. Calculating the square root:

   • After appending the function, you would click = to calculate the result. The display will show 4, which is the square root of 16.

Example Calculations

Here are a few example calculations to illustrate how to use the calculator:

• Adding multiple numbers:

  • Input: 3, then click +, input 7, click +, input 2, and finally click =. The result will be 12.

• Complex expression:

  • To calculate $12-4\times 2+6$:
    1. Click 12, then −, then 4, then ×, then 2, then +, then 6, and finally =. The display will show 10.

• Using memory functions:

  • To add 5 to memory:
    1. Enter 5, then click M+.
    2. To recall the memory value, click MR, and it will display 5.
    3. To add 3 to memory, enter 3, then click M+.
    4. Recall again by clicking MR; it will now show 8.

Using this calculator effectively will enhance your ability to perform arithmetic operations quickly and efficiently!