Assessments · 3rd–4th Grade · 8 pages
Prime and Composite Numbers Assessments | 3rd–4th Grade Math
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Prime and Composite Numbers: short check-ups with a score box and answer key. Answer key included.
What’s inside this download
- 8 printable pages of Prime and Composite Numbers assessments
- 82 problems for 3rd to 4th grade
- Short check-ups with a score box and answer key
- Answer key included
- One print-ready PDF, US Letter
Why choose this over a free worksheet
- Larger numbers that need a real check
- Targets the odd-equals-prime idea
- Keys label each number, so the odd-means-prime idea can be checked against 9 and 15
Printing, license and file formats
- One PDF, US Letter 8.5 × 11 in. On A4 choose “fit to page”
- One teacher or one household. Print unlimited copies for your own students, this year and next
- Sharing the file itself needs a separate license
- Digital download — nothing ships
How do I get the files?
- The download link is on the order page the moment you pay, and in your inbox at the same time
- Re-download from that link any time — no account needed
- Wrong or broken file? Email support@pencillane.com and we fix it or refund you
Why get the bundle
- Cards, cut-and-paste and games let children test numbers in different ways until factor-checking becomes a habit.
The problem
71 is prime, but 9 is not, and both are odd
Many children believe every odd number is prime. Deciding takes a quick check for factors, not a glance at the last digit.
Odd means prime
9, 15 and 21 are odd, yet 3 divides each one. Children who equate odd with prime get these wrong.
The special cases
1 is neither prime nor composite, and 2 is the only even prime. These exceptions need to be named, not guessed.
Larger numbers need a method
To decide about 71 or 89, a child has to test small divisors like 2, 3, 5 and 7, rather than trust a hunch.
Each question gives a number and asks prime or composite. Children test for a factor other than 1 and the number itself, and use arrays or facts to say why.
What’s inside
8 pages of Prime and Composite Numbers, ready to print.
Short check-ups with a score box and answer key. One instruction line and a name line on every page.
Assessments
Short check-ups with a score box and answer key.
Prime and Composite Numbers
Written for 3rd to 4th grade.
Print and go
US Letter, black and white, answer key included.
Look inside
Same layout on every page, so kids stop re-learning the instructions.
How it works
Ready before the printer warms up.
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1
Download
Check out, and your download link is in your inbox and on screen in seconds. One PDF, 8 pages.
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2
Print
Any printer, plain paper, black and white. Print one page or the whole stack.
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3
Hand out
Morning work, centers, small groups, the kitchen table. Same format every day, so the routine sticks.
US Letter 8.5 × 11 · PDFOutcomes
Sort numbers as prime or composite
Look for a factor besides 1 and itself.
- 71 has no factors but 1 and 71
- 89 has no factors but 1 and 89
- 17 has no factors but 1 and 17
- 113 has no factors but 1 and 113
- 163 has no factors but 1 and 163
- 67 has no factors but 1 and 67
- 191 has no factors but 1 and 191
Who it’s for
Built for the kitchen table and the classroom.
Parents & homeschool
Make arrays with counters. A number that only makes one row, like 7, is prime. Try 9, 12 and 17.
Teachers
Fits fourth grade after factors and multiples. The cut-and-paste sort makes a good center.
Number-theory practice
Students who know their times tables can use them to rule numbers out quickly.
Questions
Before you buy.
Does the set include larger primes?
Yes. Numbers such as 71 and 89 appear, so children must check divisors, not assume.
What do I need to know first?
Multiplication facts and the idea of a factor. Factors and Multiples is a good lead-in.
How do I get the file?
The download link appears right after checkout and lands in your inbox at the same time. One PDF with 8 pages. No account needed.
Can I print it more than once?
Yes. One teacher or one household can print unlimited copies for their own students, this year and next.
Will it print in color?
The pages are designed to print in black and white, so they print clean on any home or school printer and do not eat a cartridge.
What if it isn’t right for us?
Email support@pencillane.com within 30 days and we refund the full $3.50. No form, no questions.
Test for factors, then decide
Prime and Composite Numbers: short check-ups with a score box and answer key. Answer key included.
Get it — $3.50