Step-by-step procedure for long division

Step-by-step procedure

This is the recipe for dividing a 2-, 3- or 4-digit dividend by a two-digit divisor. The steps are the same; only the number of repetitions changes.

Set up the layout

Write the dividend on the left, then a colon, then the divisor, then `=`. After the equals sign you will write the quotient digits one by one. To the right, leave space for "remainder X". Below the dividend, draw a workspace for the partial products and differences.

For :

1234 : 56 = ?

Step 1 – first chunk

Pick the smallest left-hand chunk of the dividend that is at least as large as the divisor. For and divisor :

  • Just ? No — too small.
  • ? Still too small ().
  • ? Yes — .

So the first chunk is .

Step 2 – estimate the quotient digit

We are looking for the largest digit from 1 to 9 that we can multiply by the divisor such that the result still fits inside . We try:

  • — that fits inside .
  • — that is bigger than , so too much.

So the right digit is . Write it as the first digit of the quotient.

Step 3 – multiply and write below

Multiply the divisor by the quotient digit (). Write the product directly under the chunk ().

1234 : 56 = 2…
112

Step 4 – subtract

Draw a small bar and subtract: . Write the difference below the bar.

1234 : 56 = 2…
112
───
 11

Step 5 – bring down the next digit

Bring down the next digit of the dividend (here ) and append it to the right of the difference. The new chunk is .

Now repeat steps 2–4 with the new chunk :

  • We look for a digit that, multiplied by , gives a number close to but not bigger. — fits nicely; is too much. The digit is .
  • Write as the next digit of the quotient: the quotient is now .
  • Write below and subtract: .
1234 : 56 = 22 r. 2
112
───
 114
 112
 ───
   2

Step 6 – stop and read the remainder

When there are no more digits in the dividend to bring down, the last difference is the remainder. Here it is . Check that it is smaller than the divisor — is indeed less than , so we are done.

Final answer: remainder .

How many digits will the quotient have?

A handy rule of thumb:

  • 2-digit dividend ÷ 2-digit divisor → 1-digit quotient.
  • 3-digit dividend ÷ 2-digit divisor → 2-digit quotient (when the leading 2 digits of the dividend are at least the divisor).
  • 4-digit dividend ÷ 2-digit divisor → 3-digit quotient (when the leading 2 digits of the dividend are at least the divisor).

The exercise generator uses these patterns so the difficulty grows in clean steps.

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Practise