Standard Calculator

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Standard Arithmetic Calculator

Perform basic addition, subtraction, multiplication, and division instantly.

Addition (+) Subtraction (-) Multiplication (×) Division (÷)

Calculation Result

0

How to Use the Standard Calculator

This standard calculator is designed for quick, every-day arithmetic tasks. Whether you are balancing a personal ledger, checking homework, or measuring dimensions for a DIY project, this tool provides precise results for the four fundamental operations of mathematics.

Core Mathematical Operations

  • Addition (+): Finds the sum of two values. Ideal for totaling quantities.
  • Subtraction (-): Determines the difference between two numbers. Used for finding remaining balances or gaps.
  • Multiplication (×): Calculates the product. Useful for scaling values or repeated addition.
  • Division (÷): Finds the quotient. Essential for splitting totals into equal parts.

Practical Examples

Scenario Calculation Result
Totaling items 45 + 125 170
Finding a discount 200 – 45 155
Bulk pricing 12 × 5.5 66
Sharing a bill 150 ÷ 4 37.5

Arithmetic Best Practices

While this calculator handles two inputs at a time, remember the order of operations (PEMDAS/BODMAS) when performing complex manual calculations: Parentheses, Exponents, Multiplication and Division (left to right), and Addition and Subtraction (left to right).

function calculateStandard() { var num1 = document.getElementById("firstNumber").value; var num2 = document.getElementById("secondNumber").value; var op = document.getElementById("operator").value; var resultDisplay = document.getElementById("standardFinalOutput"); var stringDisplay = document.getElementById("calculationString"); var resultArea = document.getElementById("standardResultArea"); if (num1 === "" || num2 === "") { alert("Please enter both numbers to calculate."); return; } var n1 = parseFloat(num1); var n2 = parseFloat(num2); var result = 0; var opSymbol = ""; switch (op) { case "add": result = n1 + n2; opSymbol = "+"; break; case "subtract": result = n1 – n2; opSymbol = "-"; break; case "multiply": result = n1 * n2; opSymbol = "×"; break; case "divide": if (n2 === 0) { alert("Cannot divide by zero."); return; } result = n1 / n2; opSymbol = "÷"; break; default: result = 0; } // Format result to avoid long floating point issues var formattedResult = Number.isInteger(result) ? result : parseFloat(result.toFixed(8)); resultDisplay.innerHTML = formattedResult; stringDisplay.innerHTML = n1 + " " + opSymbol + " " + n2 + " = " + formattedResult; resultArea.style.display = "block"; }

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