4-digit by 1-digit multiplication worksheets

Four digits over one adds no new rule — it just runs the same single row its full length, across ones, tens, hundreds, and thousands. These free printable worksheets multiply a four-digit number by a one-digit number in column form, like 2431 × 6.

Kid stuck on one? You don’t just get the sheet.

4-digit by 1-digit multiplication
4-digit by 1-digit multiplication worksheet — 4-digit × 1-digit, free printable with answer key

The answer key prints on a separate page.

What's on this sheet

The method is identical to the shorter sheets, carried out four times: multiply the bottom digit by the ones, tens, hundreds, and thousands, passing each carry along. 2431 × 6 runs six ones is six, six threes is eighteen — write 8, carry 1, six fours plus one is twenty-five — write 5, carry 2, six twos plus two is fourteen, giving 14,586. Notice that a four-digit number times a single digit can spill into the ten-thousands, so the answer often has five digits.

Why this sheet works

With no new idea to learn, the difficulty is entirely in staying tidy. A carry dropped four columns in, or a digit that drifts out of its column, is the usual cause of a wrong answer here — not the arithmetic itself. That makes 4-digit-by-1-digit good practice for the discipline the harder two-digit-multiplier sheets will demand: straight columns, small carries, one place at a time.

How this one works

One question from this sheet, worked through a step at a time.

1327 × 2

1327 2 2654
  1. 1327 × 2, set out in columns. Multiply one place at a time, starting at the ones on the RIGHT.
  2. The ones: 7 × 2 = 14. Write the 4 and carry the 1.
  3. The tens: 2 × 2 = 4, and the 1 carried over makes 5. Write the 5.
  4. The hundreds: 3 × 2 = 6. Write the 6.
  5. The thousands: 1 × 2 = 2. Nothing further to carry into, so all of 2 is written down.
  6. So 1327 × 2 = 2654.