Solution

long subtraction

Solution

Solution steps
Line up the numbers
Subtract each column of digits, starting from the right and working left
If the digit being subtracted is larger than the digit above it, 'borrow' a digit from the next column to the left.
In the bolded column, subtract the second digit from the first
The bottom number is larger than the upper number. Try to'borrow' a digit from the left.
Borrow from . The remainder is
Add ten to :
In the bolded column, subtract the second digit from the first:
In the bolded column, subtract the second digit from the first:
Number Line

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Frequently Asked Questions (FAQ)

  • What is longsub 20-12 ?

    The solution to longsub 20-12 is 8