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Name ________________________________________ Date __________________ Class _________________ LESSON 9-2 Prime Factorization Practice and Problem Solving: D List all of the factors of each number. Circle the prime factors. The first one is done for you. 1. 6 2. 9 1; 2; 3; 6 _______________________ 4. 12 3. 10 ________________________ 5. 21 _______________________ ________________________ 6. 31 ________________________ ________________________ Write the prime factorization of each number. The first one is done for you. 7. 9 8. 25 2 3 _______________________ 10. 14 9. 8 ________________________ 11. 12 _______________________ ________________________ 12. 15 ________________________ ________________________ 13. There are 12 chairs in the meeting hall and an odd number of tables. Each table has the same number of chairs. How many tables are there? ________________________________________________________________________________________ 14. What are two different ways that 9 can be written as a product of two numbers? ________________________________________________________________________________________ 15. Find the prime factorization of 63 with the factor ladder. The first step is done for you. 3 63 ______ ______ ______ ______ 1 Prime factorization: _____________________________________________________________________ Name ________________________________________ Date __________________ Class _________________ LESSON 9-2 Prime Factorization Practice and Problem Solving: A/B Fill in the missing information. Add more “steps” to the ladder diagram and more “branches” to the tree diagram, if needed. Then, write the prime factorization of each number. 1. 2. 3 7 36 _____ _____ _____ _____ 42 _____ _____ _____ _____ _____ _____ _____ 1 ________________________________________________________________________________________ 3. 4. 48 27 ´ ´ ´ ´ ´ ________________________________________________________________________________________ Write the prime factorizations. 5. 44 _______________ 6. 125 _______________ 7. 85 ________________ 8. 39 ________________
