Prime and Composite Numbers
Grade 4•45 minutes•5.NS.2 The student will demonstrate an understanding of prime and composite numbers, and determine the prime factorization of a whole number up to 100.
Learning Objective
I can show if a number up to 100 is prime or composite by drawing a picture or using objects, and explain why.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain, in your own words, the difference between a prime number and a composite number.
2. Draw a picture using dots or other objects to show that the number 9 is a composite number. Explain how your picture demonstrates that 9 is composite.
3. Is the number 17 prime or composite? Explain your answer and show how you know using the factor T-chart method.
...and 4 more questions
Educational Video
Prime and Composite Numbers
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