Long Subtraction Calculator
Subtract two numbers, column by column.
Long subtraction aligns numbers by place value and subtracts each column, borrowing when needed.
The math behind it
Subtract column by column from the right; if the top digit is smaller, borrow 10 from the next column.
Worked example
8003 − 2547 = 5456.
FAQ
What is borrowing?
Taking 10 from the next column to the left when the current top digit is too small to subtract from.