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Missing Factor is a free printable Grade 3 maths worksheet on the unknown as one of the factors, aligned to Common Core standard 3.OA.A.4. It prints 16 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 25 of 25 · the same problems every time you open this link.

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One paper per pupil

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Missing Factor

3.OA.A.4

NameDate

Work out each answer.

1.___ × 9 = 63
2.4 × ___ = 28
3.___ × 2 = 16
4.9 × ___ = 27
5.___ × 5 = 45
6.5 × ___ = 10
7.___ × 5 = 15
8.___ × 2 = 4
9.2 × ___ = 14
10.6 × ___ = 12
11.3 × ___ = 15
12.4 × ___ = 36
13.___ × 3 = 9
14.___ × 7 = 28
15.___ × 8 = 72
16.3 × ___ = 27

LessonPrint · 3.OA.A.4 · Set 25 · free to copy for classroom use

Answer key — Missing Factor

Set 25. Prints on its own sheet.

  1. 1.7
  2. 2.7
  3. 3.8
  4. 4.3
  5. 5.9
  6. 6.2
  7. 7.3
  8. 8.2
  9. 9.7
  10. 10.2
  11. 11.5
  12. 12.9
  13. 13.3
  14. 14.4
  15. 15.9
  16. 16.9

More practice for 3.OA.A.4

Find the missing number in a multiplication or division sentence.

Teaching this next? Finding the Unknown Factor is the 45-minute plan for it, with the misconceptions to expect.

All Grade 3 worksheets

Last reviewed 2026-09-05. Aligned to 3.OA.A.4 of the Common Core State Standards for mathematics.