Skip to the content
Peabody TeachFor teachers and grown-ups

Factors, multiples and primes: 4th grade math

Factors, multiples, prime and composite (to 100). A free 4th grade lesson plan, a question set with answers and a printable sheet with its key. Copy it and make it yours.

Lesson plan

Goal

  • Students can do this: factors, multiples, prime and composite (to 100).

Teach (10 min)

  • A factor divides into a number exactly, with nothing left over.
  • The factors of 12 are 1, 2, 3, 4, 6 and 12.
  • Work one example on the board while students say each step aloud, then do one together.

Practise (15 min)

  • Students work the printable sheet in pairs, then alone.
  • Or practise it as a game with no sign-up: https://peabody.kids/math/whole.factors?lesson=4-factors&at=4

Exit ticket (5 min)

  • Three questions on a slip:
  • 1. Which one is a factor of 15?
  • 2. Which one is a factor of 16?
  • 3. Which one is a factor of 21?

Question set

10 questions that read in words, easiest first. Questions that need a picture are on the printable sheet below.

  1. Which one is a factor of 15?
  2. Which one is a factor of 16?
  3. Which one is a factor of 21?
  4. Which one is a factor of 12?
  5. Which one is a factor of 16?
  6. Which one is a factor of 14?
  7. Which one is a factor of 15?
  8. Which one is a factor of 18?
  9. Which one is a factor of 21?
  10. Which one is a factor of 18?
Answers
  1. 3
  2. 8
  3. 3
  4. 3
  5. 2
  6. 7
  7. 3
  8. 3
  9. 3
  10. 6

Printable sheet

Name: ____________________   Date: ____________

Factors, multiples and primes (4th grade)

  1. Which one is a factor of 24?
  2. Which one is a factor of 20?
  3. Which one is a factor of 14?
  4. Which one is a factor of 14?
  5. Which one is a factor of 20?
  6. Which one is a factor of 15?
  7. Which one is a factor of 16?
  8. Which one is a factor of 28?
  9. Which one is a factor of 54?
  10. Which one is a factor of 32?
  11. Which one is a factor of 54?
  12. Which one is a factor of 60?
Key
  1. 6
  2. 5
  3. 7
  4. 7
  5. 5
  6. 5
  7. 8
  8. 2
  9. 18
  10. 8
  11. 6
  12. 5

Written by Peabody from its own skill pages. Free, no ads, no sign-in. Children can practise this on Peabody. More from teachers: teacher-shared resources.