Multi-digit × One-digit

Start from the ones, multiply every digit, carry when a product makes tens

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About This Practice

To multiply a multi-digit number by a single digit, start from the ones: the digit multiplies every place in turn, and whenever a step makes tens, carry that many to the next place. The step-by-step column demo shows a full 3-digit × 1-digit calculation with every product and carry marked.

A step-by-step column demo of a 3-digit number times a 1-digit number: multiply the ones, then the tens, then the hundreds — carrying whenever a step makes tens. Tap “Next step” to see each multiplication and its carry.

MediumEstimated Time: 12mincolumn multiplicationcarryingthree-digitone-digit

How to Play

  1. Read the problem: what is the 3-digit number, what is the single digit?
  2. Tap “Next step”: multiply the ones first — how much is carried?
  3. Multiply the tens: add the carry coming from the ones.
  4. Finally multiply the hundreds, handling its carry too.
  5. Say the complete product and check every place was multiplied and every carry added.

Learning Objectives

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