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Factors and Prime Numbers WORKSHEET
Suitable for Grades: 4th Grade
CCSS: 4.OA.B.4
CCSS Description: Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.
Factors and Prime Numbers WORKSHEET DESCRIPTION
‘Factors and Prime Numbers’ is the perfect introduction to prime factor decomposition or consolidation activity after working with factors and identifying prime numbers.
In order to equip students with a systematic approach, they are provided with a table of numbers from 1 - 30 and 1 - 50 and asked to highlight all the prime numbers and factors of 30 and 50 respectively. The identified numbers are then sorted in venn diagrams into sets of primes and factors. The prime factors of these numbers suddenly appear in the intersections!
Students will repeat this activity with four more venn diagrams to complete. For extra challenge, we have included some three set venn diagrams, giving teachers and parents the opportunity to discuss common factors.
