Long Division

Below is the process written out in full.
You will often see other versions, which are generally just a shortened version of the process below
.
You can also see this done in Long Division Animation.

Let's see how it is done with:

Long division layout with divisor 25 and dividend 425

The 4 Repeating Steps:

Long division repeats these four steps until there are no more digits to bring down:

  • Divide
  • Multiply
  • Subtract
  • Bring down

A handy way to remember: Dad, Mom, Sister, Brother.

And here we go:

Step 1: dividing first digit 4 by 25 gives 0 4 ÷ 25 = 0 remainder 4 The first digit of the dividend (4) is divided by the divisor.
Step 2: 0 written in the quotient above digit 4   The whole number result is placed at the top. Any remainders are ignored at this point.
Step 3: 25 times 0 equals 0 written beneath 4 25 × 0 = 0 The answer from the first operation is multiplied by the divisor. The result is placed under the number divided into.
Step 4: subtracting 0 from 4 leaves 4 4 − 0 = 4 Now we subtract the bottom number from the top number.
Step 5: bring down next digit 2 next to 4 to make 42   Bring down the next digit of the dividend.
Step 6: dividing 42 by 25 gives 1 remainder 17 42 ÷ 25 = 1 remainder 17 Divide this number by the divisor.
Step 7: 1 written in the quotient above digit 2   The whole number result is placed at the top. Any remainders are ignored at this point.
Step 8: 25 times 1 equals 25 written beneath 42 25 × 1 = 25 The answer from the above operation is multiplied by the divisor. The result is placed under the last number divided into.
Step 9: subtracting 25 from 42 leaves 17 42 − 25 = 17 Now we subtract the bottom number from the top number.
Step 10: bring down next digit 5 next to 17 to make 175   Bring down the next digit of the dividend.
Step 11: dividing 175 by 25 gives 7 remainder 0 175 ÷ 25 = 7 remainder 0 Divide this number by the divisor.
Step 12: 7 written in the quotient above digit 5   The whole number result is placed at the top. Any remainders are ignored at this point.
Step 13: 25 times 7 equals 175 written beneath 175 25 × 7 = 175 The answer from the above operation is multiplied by the divisor. The result is placed under the number divided into.
Step 14: subtracting 175 from 175 leaves 0 175 − 175 = 0 Now we subtract the bottom number from the top number.
    There are no more digits to bring down. The answer must be 17
1639, 1640, 1641, 1642, 1643, 1644, 1841, 1842, 1843