Long Division

Key concept

Long division is a method for dividing large numbers in small steps. You repeat divide, multiply, subtract, bring down until no digits are left. Anything left over is the remainder.

Long Division - introduction visual

Video Lesson

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Long Division poster

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Flashcards

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Long division example solving 364 divided by 30, showing steps with quotient 12 and remainder 4, including a check with reverse calculation.Long division example of 1615 divided by 7, showing step-by-step process with a final result of 230 remainder 5.

Understanding the Parts of Long Division

  • The dividend is the number being divided, and the divisor is the number you divide by.
  • The quotient is the answer on top, and the remainder is what is left at the end.

Checking a Long Division Answer

  • You can check your answer using: Quotient × Divisor + Remainder = Dividend.
  • For example, , so is correct.

Practice Questions

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Interactive Activity

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Students Also Ask

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The dividend is the number being divided, and the divisor is the number you divide by. In 364 divided by 30, the dividend is 364 and the divisor is 30. The whole-number answer you write above the line is called the quotient.

A remainder is the amount left over when the divisor does not divide the dividend exactly. After dividing 364 by 30, you reach a quotient of 12 with 4 left over, so the remainder is 4. You write it beside the quotient.

Multiply the quotient by the divisor, then add the remainder. If the total matches the original dividend, your answer is correct. For 364 divided by 30, that is 12 × 30 + 4, which gives 364, so the long division is right.

When the divisor does not fit into the current number, you write 0 in that place above the line and carry on. For example, 7 does not fit into 5, so you write 0, keeping every quotient digit in its correct column.

Long division repeats the same four actions in order: divide, multiply, subtract, then bring down the next digit. Once you have brought a digit down, you start the cycle again, repeating until there are no digits left to bring down.

Look at more digits of the dividend. Since 30 does not fit into the first digit 3, you use the first two digits, 36, instead. As 30 fits into 36 once, you write 1 above the line and carry on from there.

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