Long Subtraction Calculator
Subtract whole numbers in columns with borrowing, rewritten digits, negative-result handling, and a step-by-step long subtraction explanation.
Long subtraction with borrowing
English search results for long subtraction focus on borrowing and step-by-step written work. This calculator keeps the minuend, subtrahend, rewritten digits, and difference visible so the borrowing logic can be checked column by column.
a is the minuend, b is the subtrahend, and c is the difference.
- Borrow from the nearest non-zero place on the left when the top digit is too small.
- Intermediate zeroes become nines when borrowing crosses them.
- If the second number is larger, the calculator shows a negative difference.
How to check subtraction
Long subtraction is checked by the inverse operation. Add the difference back to the subtrahend. If the result matches the minuend, the column work is consistent.
c is the difference, b is the subtrahend, and a is the minuend.
Frequently Asked Questions
Sources and References
- Long Subtraction Calculator with RegroupingCalculatorSoup
- Long Subtraction CalculatorFreeSmartCalculator
- SubtractionWikipedia
Calculations are based on the listed reference sources. Links open in a new tab.
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