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Worksheets›Grade 3›Multiplication & division›Unknown factors

Unknown Factors Worksheets

Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.

Grade 3CCSS 3.OA.A.4Answer key includedPDF · Print
Open in generatorStart with an easy sheet

Easy: Missing factor, times 2, 5 and 10

  1. 1.5 × = 40
  2. 2.10 × = 30
  3. 3. × 5 = 50
  4. 4. × 10 = 40
  5. 5. × 10 = 100
  6. 6. × 2 = 8
Preview shows 6 of 12 questions. Every sheet is new; open it to change any question.

Worksheet variations

A blank in a multiplication or division equation is solved with the related fact. In 6 × [ ] = 42, divide: 42 ÷ 6 = 7.

Easy10 × = 70Missing factor, times 2, 5 and 10Medium4 × = 28Missing factor, facts to 10Hard70 ÷ = 10Missing number in multiplication or division

How to solve it: a worked example

Find the missing number.

  1. Start × 10 = 60
  2. Divide to find the missing factor60 ÷ 10 = 6
  3. Answer6

Common mistakes to watch for

  • Multiplying the two numbers shown instead of dividing.
  • Writing the product in the blank.
  • Mixing up the dividend and divisor in a division equation.

Tip: tick “Step-by-step answer key” in the generator to print each step for marking.

Related worksheets

Multiplication factsDivision factsMultiplying by multiples of 10Equivalent fractionsComparing fractions

FAQ

Is every worksheet different?

Yes. Numbers are generated each time, and the answer key is calculated for that sheet. Swap any single question and its answer updates too.

Can I mix unknown factors with other skills?

Yes. In the generator, add more skills; each gets its own section on the sheet with its own instructions.

Is it free to print?

Yes. Generating and printing from the browser is free with no sign-up. PDF downloads need a free account.