Grade 4 Prime & Composite Worksheet (Set C)
Free printable Grade 4 prime & composite worksheet with an answer key, prime and composite numbers. Print as a PDF for the classroom or home.
How to teach prime and composite numbers teaching guide, with a worked explanation.
✓ Answer key checked by math, never wrong
Grade 4 · Math worksheet
Name
Date
Math
Prime or Composite
Write whether each number is prime or composite.
- 1.Is 40 prime or composite?
- 2.Is 18 prime or composite?
- 3.Is 52 prime or composite?
- 4.Is 50 prime or composite?
- 5.Is 27 prime or composite?
- 6.Is 60 prime or composite?
- 7.Is 3 prime or composite?
- 8.Is 4 prime or composite?
- 9.Is 57 prime or composite?
- 10.Is 9 prime or composite?
- 11.Is 54 prime or composite?
- 12.Is 25 prime or composite?
- 13.Is 4 prime or composite?
- 14.Is 2 prime or composite?
- 15.Is 3 prime or composite?
- 16.Is 57 prime or composite?
- 17.Is 38 prime or composite?
- 18.Is 37 prime or composite?
- 19.Is 44 prime or composite?
- 20.Is 5 prime or composite?
Made with ChalkBee · chalkbee.com
Want a different version?
Generate a fresh Grade 4 prime & composite worksheet with new numbers, or build any topic from scratch.
Make your own worksheetAbout this worksheet
A prime number has exactly two factors (1 and itself); a composite number has more than two.
In class: Test whether a number has exactly two factors (prime) or more (composite) using arrays. Learn that 1 is neither.
This Grade 4 prime & composite set is free to print or save as a PDF, and its answer key is computed in code, so it is never wrong.