Worksheet
Grades 4–6
Build a Factor Tower
Worksheet · 4.OA.B.5
$1.50
Math · Curriculum resources
Prime or composite Numbers Worksheets and Activities
Explore our collection of prime and composite number resources for grades 4 to 6. This hub includes worksheets, color-by-number activities, and games that help students identify and classify numbers from 1 to 100. Whether you teach fourth graders or sixth graders, you will find no-prep, standards-aligned materials ready for your classroom.
6 results
Worksheet
Grades 4–5
Prime or Composite Numbers
Worksheet · 4.OA.B.4
$1.50
Worksheet
Grades 4–5
Composite Numbers
Worksheet · 4.OA.B.4
Free
Worksheet
Grade 4
Prime & Composite Color by Number — Polar Bear
Worksheet · 4.OA.B.4
$1.50
Worksheet
Grade 4
Prime & Composite Color by Number — CBN.WINTER.22-2
Worksheet · 4.OA.B.4
$1.50
Worksheet
Grade 4
Prime & Composite Color by Number — Arctic Fox
Worksheet · 4.OA.B.4
$1.50
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About these Prime or composite Numbers worksheets and activities
In the elementary grades, students first learn to define prime numbers as numbers greater than 1 with exactly two factors, and composite numbers as numbers with more than two factors. By grade 4, they apply this understanding to numbers up to 100, using strategies like factor towers and divisibility rules. As they move into grades 5 and 6, students deepen their reasoning by exploring prime factorization, common factors, and the relationship between factors and multiples. Our resources scaffold this progression: early activities focus on sorting and identifying primes and composites, while later tasks challenge students to build factor towers or solve color-by-number puzzles that reveal hidden pictures. Related concepts include factors, multiples, divisibility, and the fundamental theorem of arithmetic. Each resource is teacher-authored and designed to build number sense through hands-on practice.
Using these in your classroom
Use this hub to differentiate instruction across a mixed-ability classroom. For whole-group lessons, display a color-by-number activity on your board and work through the first few numbers together. In small groups, have students sort number cards into prime and composite categories. For independent practice, assign printable worksheets or the self-checking digital versions for homework or literacy centers. Struggling learners can start with simple identification tasks, while advanced students tackle factor towers or write prime factorizations. Mix printable PDFs with interactive digital activities to keep engagement high. Use the resources as pre-assessments, review games, or quick checks for understanding. All materials are classroom-ready and require no prep.
Standards alignment
These resources align with Common Core standards for grades 4 through 6, particularly those addressing gain familiarity with factors and multiples, and use of prime factorization. Specific grade-level standards are noted on each resource.
Frequently asked questions
Are these Prime or composite worksheets printable?
Yes, every resource includes a printable PDF version. You can print them for morning work, centers, or homework. Some resources also come with a self-checking digital version for interactive practice.
Are these Prime or composite worksheets for kids?
Absolutely. The activities are designed for elementary students in grades 4 to 6. They use engaging formats like color-by-number and factor towers to make learning prime and composite numbers fun and accessible.
Do I need a membership to access all resources?
Some resources are free, but most require a paid Workybooks membership. Membership gives you unlimited access to all printable and digital resources on the platform.
How can I use these resources for different grade levels?
Each resource indicates its target grade range. For grade 4, start with basic identification activities. For grades 5 and 6, use tasks that involve prime factorization or factor towers. The hub makes it easy to find the right level for your students.