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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.
Prime Numbers WORKSHEET DESCRIPTION
Once your students can define and identify prime numbers, this worksheet will aid their recall of the prime numbers under 100.
In section A, learners have to circle prime numbers from a list of 27 numbers. Watch out, we’ve added some common misconceptions in here with numbers such as 21 that students often mis-identify.
Next, students will write down all the prime numbers between 20 and 40.
Section C will test students' knowledge of prime numbers as it introduces them to the interesting concept of some square numbers being made by the sum of two prime numbers.
This worksheet ends with an extension looking at perfect numbers.
