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Missing factor worksheets

Find the missing number in 6 × ___ = 42 or 42 ÷ ___ = 6. Three versions of twenty with answer keys, which connect multiplication and division.

Missing factor: factors up to 10

NameDate

Write the missing number.

  1. 90 ÷ = 10
  2. × 9 = 63
  3. 12 ÷ = 4
  4. 7 × = 56
  5. × 8 = 64
  6. 7 × = 42
  7. × 9 = 81
  8. 24 ÷ = 8
  9. ÷ 6 = 8
  10. 5 × = 30
  11. × 3 = 18
  12. × 9 = 90
  13. × 8 = 80
  14. × 3 = 24
  15. × 4 = 20
  16. 24 ÷ = 4
  17. 4 × = 20
  18. × 6 = 54
  19. 10 × = 90
  20. × 7 = 63
Sheet AFree at teach.peabody.kids

Missing factor: factors up to 10

NameDate

Write the missing number.

  1. × 8 = 24
  2. × 6 = 36
  3. ÷ 8 = 7
  4. 5 × = 10
  5. 60 ÷ = 6
  6. 2 × = 6
  7. 4 × = 40
  8. × 6 = 42
  9. × 8 = 16
  10. 20 ÷ = 10
  11. 7 × = 49
  12. ÷ 10 = 8
  13. 60 ÷ = 10
  14. 9 × = 72
  15. 9 ÷ = 3
  16. 8 × = 48
  17. 36 ÷ = 4
  18. ÷ 2 = 6
  19. 10 × = 70
  20. 15 ÷ = 5
Sheet BFree at teach.peabody.kids

Missing factor: factors up to 10

NameDate

Write the missing number.

  1. × 10 = 80
  2. 28 ÷ = 4
  3. ÷ 3 = 7
  4. 7 × = 35
  5. × 5 = 30
  6. × 5 = 10
  7. × 2 = 12
  8. 9 × = 54
  9. ÷ 5 = 7
  10. ÷ 4 = 4
  11. ÷ 5 = 9
  12. 8 × = 64
  13. ÷ 7 = 4
  14. 8 ÷ = 4
  15. 5 × = 35
  16. ÷ 10 = 5
  17. × 2 = 4
  18. × 7 = 28
  19. ÷ 7 = 7
  20. ÷ 6 = 4
Sheet CFree at teach.peabody.kids

Answer key

Sheet A

  1. 9
  2. 7
  3. 3
  4. 8
  5. 8
  6. 6
  7. 9
  8. 3
  9. 48
  10. 6
  11. 6
  12. 10
  13. 10
  14. 8
  15. 5
  16. 6
  17. 5
  18. 9
  19. 9
  20. 9

Sheet B

  1. 3
  2. 6
  3. 56
  4. 2
  5. 10
  6. 3
  7. 10
  8. 7
  9. 2
  10. 2
  11. 7
  12. 80
  13. 6
  14. 8
  15. 3
  16. 6
  17. 9
  18. 12
  19. 7
  20. 3

Sheet C

  1. 8
  2. 7
  3. 21
  4. 5
  5. 6
  6. 2
  7. 6
  8. 6
  9. 35
  10. 16
  11. 45
  12. 8
  13. 28
  14. 2
  15. 7
  16. 50
  17. 2
  18. 4
  19. 49
  20. 24
Answer keyFree at teach.peabody.kids

Missing factor: 20 problems a sheet, 3 versions that do not repeat each other where the numbers allow.

How to use it

  1. Look at the sheet: it is a real, printable sheet. Switch between Sheet A, B and C, or press New numbers (N) for a fresh set.
  2. Change how many problems, how many versions, and whether the key prints. Settings stay in this browser; Share copies a link that rebuilds the same sheets.
  3. Press Print sheet A and key, or Print all. The answer key prints on its own page, so you can keep it back.

Ideas for class

  • Read each problem aloud with the blank as the word what: six times what is forty-two.
  • Ask students to write the matching multiplication sentence beside every division problem.
  • Use the first three problems as a class, with counters, so students see the groups before they use the facts.

Related

Questions

Why does the blank move around?

A missing factor can be the first or second number, and in a division problem it can be the divisor or the dividend. The sheet moves it on purpose, so students must read the sentence rather than learn a pattern.

What range of facts does this cover?

Factors from 2 to 10 on this page. The maker also has a version up to 5 and a version up to 12.

Are the answer keys checked?

Each answer is worked out by the code that wrote the problem, and our tests recompute every answer a second way and compare. Please still look over the key before you grade a class set.

Nothing you do here is sent to us. Names, lists and settings stay in this browser. No sign-in, no ads.

What this worksheet covers

In these problems the product or quotient is known and a factor is missing. Some are written as multiplication, such as ___ × 8 = 56, and some as division, such as 56 ÷ ___ = 7. They teach the idea that division undoes multiplication, because a student who wants 6 × ___ = 42 is really asking what 42 divided by 6 is.

Who it is for

Third grade. Common Core 3.OA.A.4 asks students to find the unknown whole number in a multiplication or division equation, and 3.OA.B.6 asks them to see division as an unknown-factor problem. It is a good bridge from the multiplication sheets to the division ones.

Finding the missing number in a multiplication or division sentence · grade 3

A worked example

For 6 × ___ = 42, ask what times 6 makes 42. A student who knows 6 × 7 = 42 writes 7. For 42 ÷ ___ = 6, they ask how many groups of 6 fit in 42, or what number multiplied by 6 gives 42, and they write 7 again.

Mistakes to watch for

  • Multiplying the two numbers they see, so 6 × ___ = 42 gets 252. Check whether the answer is bigger than the product, which cannot be right.
  • Putting the product in the blank when the blank is the divisor. Read the whole sentence back and see whether it is true.

Make it your own

This sheet is one setting of the math worksheet generator. Open it there to change the skill, the range of numbers or the heading, or to mix several skills on one sheet.