Add whole numbers, decimals, and many rows confidently. See carries, running totals, and neat output. Built for homework checks, worksheets, classrooms, and quick revision.
Total Sum = a1 + a2 + a3 + ... + an
Average = Total Sum ÷ Number of Addends
Long addition works column by column from right to left. Add all digits in the same place value. If a column total is 10 or more, write the ones digit in that column and carry the remaining value into the next column.
For decimals, line up the decimal points first. Then add the tenths, hundredths, and other decimal places in the same way as whole-number columns.
| Step | Addend | Running Total |
|---|---|---|
| 1 | 4,587 | 4,587 |
| 2 | 9,675 | 14,262 |
| 3 | 2,308 | 16,570 |
| 4 | 4,199 | 20,769 |
| Final Sum | 20,769 | |
Long addition is the column method for adding numbers. You align place values, start from the rightmost column, and carry extra value into the next column when a column total reaches 10 or more.
Yes. It aligns decimal places before adding. That lets you total whole numbers and decimal values together while keeping place value correct throughout the calculation.
Yes. The calculator can total positive and negative values accurately. The carry worksheet is mainly intended for non-negative classroom-style long addition, but the final answer remains exact.
One number per line keeps the worksheet organized and makes the running totals easier to review. It also reduces input mistakes when you paste long lists from notes, homework, or spreadsheets.
The carry row shows the value passed from one column into the next. It helps students verify each intermediate step instead of only checking the final total.
Both exports include the main result, summary metrics, each entered addend, and the running total after every addition step. That makes it easy to save, print, or share your work.
Charts use browser-friendly numeric plotting. Extremely large values may be visually rounded in the graph, even though the calculator itself keeps the exact string-based total for the displayed answer.
Students can enter worksheet numbers, predict the answer manually, and then compare the final sum, carry row, and running totals. That makes it useful for checking both accuracy and method.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.