Long addition is a method for adding numbers together. It is especially useful for numbers with multiple digits.

Steps:

• Align the numbers vertically so their digits form columns.
• Start with the rightmost column and add the numbers.
• Write the last digit of the sum below the line.
• If the sum is 10 or more, "carry over" the other digit(s) to the next column on the left.
• Repeat the process for each column, moving from right to left, including any carried-over numbers.

Disclaimer: This calculator is for educational purposes only. While we strive for accuracy, please verify all results for critical applications.