Free Year 4 prime & composite worksheets
6 free printable Year 4 prime & composite worksheets for Australian classrooms, prime and composite numbers. Every answer key is computed in code from the exact questions on the page, so the answers are never wrong. Pick a set below to print or save as a PDF, or make your own. There is no login, and Pro unlocks the printable answer key and removes the watermark.
What is prime & composite?
A prime number has exactly two factors (1 and itself); a composite number has more than two.
How to teach it
Test whether a number has exactly two factors (prime) or more (composite) using arrays. Learn that 1 is neither.
Worked example
Common mistake
Calling 1 prime, and assuming all odd numbers are prime (9, 15).
What's inside
- Is 54 prime or composite?
- Is 30 prime or composite?
- Is 34 prime or composite?
- Is 17 prime or composite?
- Is 30 prime or composite?
- Is 47 prime or composite?
Sample questions. Each printable set below has fresh numbers; its printable answer key is available with Pro.
Year 4 prime & composite worksheet sets
All prime & composite worksheets →Sets A-F are the same worksheet with different questions - print any (or all) for fresh practice.
Frequently asked questions
Are these Year 4 prime & composite worksheets free?
Yes. Every worksheet on ChalkBee is free to view and print or save as a PDF, with no login required, and the answer key is free too. Pro removes the watermark and adds differentiated sets, worksheet packs and unlimited custom generation.
Do the worksheets have answer keys?
Yes, free, on every sheet. The answers are computed in code from the exact questions on the page, and the key prints on a page of its own so the student sheet stays clean.
Which Australian Curriculum codes does this cover?
No Version 9.0 Mathematics content description maps to prime & composite at Year 4 in our mapping, so this page is levelled by age rather than by code. Browse the Year 4 codes to find the closest match.
How was the Year 4 level chosen?
The worksheets use Australian year-level naming and Australian English spelling, matched to an age-equivalent level in the library. There are 6 printable sets on this page, with dollars and cents for money and metric units for measurement.
How do I print or download them?
Open any set, then use your browser's print option to print it or to save it as a PDF. The pages are laid out to print cleanly on standard letter or A4 paper.