Long Addition Calculator
Add 2 to 6 whole numbers with a long addition work layout, place-value alignment, carries, column totals, and step-by-step explanation.
Long addition with carries
This calculator follows the English-language long addition intent: align whole-number addends by place value, add from right to left, show each carry, and keep the written work visible for checking school arithmetic.
457 and 268 are addends. 725 is the sum.
- Add 2 to 6 non-negative whole numbers.
- Use numbers up to 18 digits per addend for a readable worksheet-style layout.
- Review each place value, incoming carry, column total, written digit, and outgoing carry.
How to add in columns
Write the ones under the ones, tens under the tens, and so on. Add each column from right to left. If a column total is ten or more, write the last digit in the answer row and carry the remaining value to the next column.
| Step | What to check |
|---|---|
| Alignment | Each digit is placed under the matching place value. |
| Carry | Carries are added to the next column on the left. |
| Answer | The final carry becomes a new leading digit when needed. |
Frequently Asked Questions
Sources and References
Calculations are based on the listed reference sources. Links open in a new tab.
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