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3-Digit by 1-Digit Multiplication Worksheets

4th gradeMathFree PDF + answer key

This worksheet extends multiplication practice to three-digit numbers, such as 246 x 7, which often requires regrouping more than once in a single problem. It's suited for 4th graders who have mastered 2-digit by 1-digit multiplication and are ready for larger numbers, with an answer key included.

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2-Digit by 1-Digit2-Digit by 2-DigitTimes Tables 1-123rd Grade SetWith Answers

How to teach 3-digit by 1-digit multiplication with multiple regroupings

  1. 1

    Work right to left, one digit at a time

    Remind kids to multiply the ones digit first, then the tens, then the hundreds, carrying as needed at each step.

  2. 2

    Track multiple carries carefully

    Since three-digit problems can require carrying twice in one problem, have kids write each carried digit in the same spot every time to avoid losing track.

  3. 3

    Practice with an organizer or grid

    Boxed grid paper keeps hundreds, tens, and ones columns aligned across every step of a longer multiplication problem.

  4. 4

    Double-check with estimation

    Round the three-digit number to the nearest hundred and multiply for a quick estimate to catch place-value mistakes in the final answer.

Common mistakes kids make

  • Losing track of a carried digit partway through the problem — write every carry in a consistent, small spot above the next column.
  • Multiplying digits out of order (starting with hundreds instead of ones) — reinforce the right-to-left order every time.
  • Dropping a digit in the final answer because the product has four digits — check that the number of digits matches the estimate.
  • Forgetting to add a second carried digit when one already exists in that column — slow down and add both numbers before moving on.

Tips for parents and teachers

  • Have kids master 2-digit by 1-digit multiplication fluently before moving to three digits.
  • Use colored pencils to mark each carry so it's easy to see where a mistake happened.
  • Break problems into manageable chunks by covering later columns with a sticky note until earlier ones are solved.
  • Praise persistence — three-digit multiplication takes longer and requires more careful tracking than smaller problems.

Grade alignment

This worksheet supports Common Core standard 4.NBT.B.5, typically taught in 4th grade. Use it for practice, homework, review or a timed check of fluency.

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Frequently asked questions

What grade learns 3-digit by 1-digit multiplication?

This skill is typically taught in 4th grade as students extend their multiplication fluency to larger numbers.

How many times might I need to regroup in one problem?

A three-digit by one-digit problem can require regrouping up to two times, once from the ones column and once from the tens column.

What should my child practice before this worksheet?

2-digit by 1-digit multiplication with regrouping should be solid before attempting three-digit numbers.

Is an answer key included?

Yes, every worksheet includes a complete answer key for easy checking.

How can I help my child avoid careless mistakes?

Encourage them to estimate first, work column by column from right to left, and double-check any carried digits before finishing.