Standard Calculator
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How to Use
This standard calculator provides basic mathematical operations. Follow these steps to use it:
- Click the number buttons to enter your first value
- Select an operation (+, -, ×, /)
- Enter the second value
- Press the equals (=) button to see the result
- Use the All Clear (AC) button to reset the calculator
- Use the Backspace (⌫) button to correct mistakes
Key Features
- Basic Operations: Addition, subtraction, multiplication, and division
- Percentage Calculations: Easily calculate percentages
- Dual Display: Shows both the current calculation and result
- Error Handling: Prevents invalid operations and displays errors
- Responsive Design: Works on desktop, tablet, and mobile devices
- User-Friendly: Intuitive interface with visual feedback
Tips for Effective Use
- Use the percentage button to quickly calculate percentages. For example, to find 15% of 200, enter "200 × 15 %".
- You can chain operations together (e.g., 5 + 3 × 2) and the calculator will follow standard order of operations.
- Use the decimal point button for calculations with decimals.
- If you make a mistake while entering numbers, use the backspace button to correct it without clearing your entire calculation.
- For repeated calculations with the same number, you can press the equals button multiple times to repeat the last operation.
Frequently Asked Questions
Does this calculator follow the order of operations?
Yes, the calculator follows standard mathematical order of operations (multiplication and division before addition and subtraction).
Can I use the keyboard with this calculator?
Currently, the calculator is designed for mouse/touch input only. Keyboard support may be added in future versions.
How do I calculate percentages?
Enter the base value, then multiply (×) or add (+) depending on your calculation, then enter the percentage number and press the % button, then equals.
What happens if I divide by zero?
The calculator will display "Error" to indicate that the operation is not valid mathematically.
Can I use this calculator on my mobile device?
Yes, the calculator is fully responsive and works on all devices including smartphones and tablets.
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