TI-108 Calculator Online
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.calculator-container {
max-width: 700px;
margin: 20px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
display: flex;
flex-direction: column;
align-items: center;
}
h1 {
color: #004a99;
text-align: center;
margin-bottom: 25px;
}
.input-section {
width: 100%;
margin-bottom: 25px;
padding: 20px;
border: 1px solid #dee2e6;
border-radius: 5px;
background-color: #fdfdfd;
}
.input-group {
margin-bottom: 15px;
display: flex;
align-items: center;
gap: 10px;
}
.input-group label {
flex: 1;
min-width: 120px;
font-weight: 500;
color: #004a99;
}
.input-group input[type="number"] {
flex: 2;
padding: 10px;
border: 1px solid #ced4da;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box; /* Include padding and border in the element's total width and height */
}
.input-group input[type="number"]:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}
.button-container {
text-align: center;
margin-top: 20px;
}
button {
background-color: #007bff;
color: white;
padding: 12px 25px;
border: none;
border-radius: 5px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
margin: 0 5px;
}
button:hover {
background-color: #0056b3;
}
button:active {
background-color: #004085;
}
#result {
margin-top: 30px;
padding: 20px;
border: 1px dashed #004a99;
border-radius: 5px;
background-color: #e7f3ff;
text-align: center;
font-size: 1.5rem;
font-weight: bold;
color: #004a99;
min-height: 50px; /* Ensure there's some height even if empty */
display: flex;
justify-content: center;
align-items: center;
}
.article-content {
margin-top: 40px;
padding: 20px;
background-color: #e9ecef;
border-radius: 8px;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.article-content h2 {
color: #004a99;
border-bottom: 2px solid #004a99;
padding-bottom: 10px;
margin-bottom: 20px;
}
.article-content p {
margin-bottom: 15px;
}
.article-content ul {
margin-left: 20px;
margin-bottom: 15px;
}
.article-content li {
margin-bottom: 8px;
}
/* Responsive adjustments */
@media (max-width: 600px) {
.calculator-container {
padding: 20px;
}
.input-group {
flex-direction: column;
align-items: stretch;
}
.input-group label {
margin-bottom: 5px;
min-width: unset;
}
.input-group input[type="number"] {
width: 100%;
}
button {
width: 100%;
margin-bottom: 10px;
}
#result {
font-size: 1.3rem;
}
}
TI-108 Calculator Online
Enter values and press Calculate
Understanding the TI-108 Calculator and Basic Arithmetic
The Texas Instruments TI-108 was a straightforward, entry-level calculator designed for ease of use in homes, schools, and basic office environments. Its primary purpose was to perform fundamental arithmetic operations: addition, subtraction, multiplication, and division. Unlike more advanced scientific or financial calculators, the TI-108 focused on core computational functions, making it accessible to users of all ages and skill levels.
How the TI-108 Works (and this simulation)
The TI-108, like many basic calculators, operates sequentially. You typically input an initial value, select an operation, input a second value, and then press the equals button to see the result. The calculator then stores this result and can be used as the initial value for the next operation.
This online simulation models this process. You provide:
- Initial Value: The starting number for your calculation.
- Operation: The mathematical function you want to perform (+, -, *, /).
- Second Value: The number to be used with the selected operation and the initial value.
The Math Behind the Operations
The simulation performs the following standard arithmetic calculations:
- Addition: `Initial Value + Second Value`
- Subtraction: `Initial Value – Second Value`
- Multiplication: `Initial Value * Second Value`
- Division: `Initial Value / Second Value`
A crucial aspect of division is handling potential division by zero. If the 'Second Value' entered for a division operation is 0, the calculator will return an error, as division by zero is mathematically undefined.
Use Cases for a Basic Calculator
While seemingly simple, basic calculators like the TI-108 and this online version are invaluable for:
- Everyday Calculations: Quickly balancing a checkbook, splitting a bill, calculating discounts, or simple unit conversions.
- Educational Purposes: Teaching fundamental math concepts to young students, helping them grasp addition, subtraction, multiplication, and division.
- Quick Estimations: Performing rapid mental checks on figures without needing complex software.
- Home Budgeting: Tracking expenses and income on the go.
This online TI-108 calculator provides a convenient way to perform these basic operations directly from your web browser, offering a modern alternative to the classic hardware device.
function calculate() {
var initialValueInput = document.getElementById("initialValue");
var secondValueInput = document.getElementById("secondValue");
var operationSelect = document.getElementById("operation");
var resultDiv = document.getElementById("result");
var initialValue = parseFloat(initialValueInput.value);
var secondValue = parseFloat(secondValueInput.value);
var operation = operationSelect.value;
var result = NaN; // Default to Not a Number
if (isNaN(initialValue) || isNaN(secondValue)) {
resultDiv.textContent = "Error: Please enter valid numbers.";
return;
}
if (operation === '/') {
if (secondValue === 0) {
resultDiv.textContent = "Error: Cannot divide by zero.";
return;
}
result = initialValue / secondValue;
} else if (operation === '*') {
result = initialValue * secondValue;
} else if (operation === '+') {
result = initialValue + secondValue;
} else if (operation === '-') {
result = initialValue – secondValue;
}
if (!isNaN(result)) {
// Format the result to avoid excessive decimal places for cleaner display
// Basic formatting: if it's a whole number, show as integer, otherwise show reasonable decimals.
if (Math.abs(result – Math.round(result)) < 1e-10) { // Check if it's very close to an integer
result = Math.round(result);
} else {
result = result.toFixed(4); // Limit to 4 decimal places for non-integers
}
resultDiv.textContent = result;
}
}
function clearAll() {
document.getElementById("initialValue").value = "";
document.getElementById("secondValue").value = "";
document.getElementById("operation").value = "+"; // Reset to default
document.getElementById("result").textContent = "Enter values and press Calculate";
}